Database : MEDLINE
Search on : Cupressaceae [Words]
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[PMID]: 28985389
[Au] Autor:Azuma W; Nakashima S; Yamakita E; Ishii HR; Kuroda K
[Ad] Address:Graduate School of Agricultural Science, Kobe University, Kobe 675-8501, Japan.
[Ti] Title:Water retained in tall Cryptomeria japonica leaves as studied by infrared micro-spectroscopy.
[So] Source:Tree Physiol;37(10):1367-1378, 2017 Oct 01.
[Is] ISSN:1758-4469
[Cp] Country of publication:Canada
[La] Language:eng
[Ab] Abstract:Recent studies in the tallest tree species suggest that physiological and anatomical traits of tree-top leaves are adapted to water-limited conditions. In order to examine water retention mechanism of leaves in a tall tree, infrared (IR) micro-spectroscopy was conducted on mature leaf cross-sections of tall Cryptomeria japonica D. Don from four different heights (51, 43, 31 and 19 m). We measured IR transmission spectra and mainly analyzed OH (3700-3000 cm-1) and C-O (1190-845 cm-1) absorption bands, indicating water molecules and sugar groups, respectively. The changes in IR spectra of leaf sections from different heights were compared with bulk-leaf hydraulics. Both average OH band area of the leaf sections and leaf water content were larger in the upper-crown, while osmotic potential at saturation did not vary with height, suggesting higher dissolved sugar contents of upper-crown leaves. As cell-wall is the main cellular structure of leaves, we inferred that larger average C-O band area of upper-crown leaves reflected higher content of structural polysaccharides such as cellulose, hemicellulose and pectin. Infrared micro-spectroscopic imaging showed that the OH and C-O band areas are large in the vascular bundle, transfusion tissue and epidermis. Infrared spectra of individual tissue showed that much more water is retained in vascular bundle and transfusion tissue than mesophyll. These results demonstrate that IR micro-spectroscopy is a powerful tool for visualizing detailed, quantitative information on the spatial distribution of chemical substances within plant tissues, which cannot be done using conventional methods like histochemical staining. The OH band could be well reproduced by four Gaussian OH components around 3530 (free water: long H bond), 3410 (pectin-like OH species), 3310 (cellulose-like OH species) and 3210 (bound water: short H bond) cm-1, and all of these OH components were higher in the upper crown while their relative proportions did not vary with height. Based on the spectral analyses, we inferred that polysaccharides play a key role in biomolecular retention of water in leaves of tall C. japonica.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1710
[Cu] Class update date: 171031
[Lr] Last revision date:171031
[St] Status:In-Process
[do] DOI:10.1093/treephys/tpx085

  2 / 603 MEDLINE  
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[PMID]: 28985377
[Au] Autor:Williams CB; Reese Næsborg R; Dawson TE
[Ad] Address:Department of Integrative Biology, University of California, Berkeley, CA 94720, USA.
[Ti] Title:Coping with gravity: the foliar water relations of giant sequoia.
[So] Source:Tree Physiol;37(10):1312-1326, 2017 Oct 01.
[Is] ISSN:1758-4469
[Cp] Country of publication:Canada
[La] Language:eng
[Ab] Abstract:In tall trees, the mechanisms by which foliage maintains sufficient turgor pressure and water content against height-related constraints remain poorly understood. Pressure-volume curves generated from leafy shoots collected crown-wide from 12 large Sequoiadendron giganteum (Lindley) J. Buchholz (giant sequoia) trees provided mechanistic insights into how the components of water potential vary with height in tree and over time. The turgor loss point (TLP) decreased with height at a rate indistinguishable from the gravitational potential gradient and was controlled by changes in tissue osmotica. For all measured shoots, total relative water content at the TLP remained above 75%. This high value has been suggested to help leaves avoid precipitous declines in leaf-level physiological function, and in giant sequoia was controlled by both tissue elasticity and the balance of water between apoplasm and symplasm. Hydraulic capacitance decreased only slightly with height, but importantly this parameter was nearly double in value to that reported for other tree species. Total water storage capacity also decreased with height, but this trend essentially disappeared when considering only water available within the typical range of water potentials experienced by giant sequoia. From summer to fall measurement periods we did not observe osmotic adjustment that would depress the TLP. Instead we observed a proportional shift of water into less mobile apoplastic compartments leading to a reduction in hydraulic capacitance. This collection of foliar traits allows giant sequoia to routinely, but safely, operate close to its TLP, and suggests that gravity plays a major role in the water relations of Earth's largest tree species.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1710
[Cu] Class update date: 171031
[Lr] Last revision date:171031
[St] Status:In-Process
[do] DOI:10.1093/treephys/tpx074

  3 / 603 MEDLINE  
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[PMID]: 28387871
[Au] Autor:Chin ARO; Sillett SC
[Ad] Address:Department of Natural Resources, American River College, 4700 College Oak Drive, Sacramento, CA 95841,USA.
[Ti] Title:Leaf acclimation to light availability supports rapid growth in tall Picea sitchensis trees.
[So] Source:Tree Physiol;37(10):1352-1366, 2017 Oct 01.
[Is] ISSN:1758-4469
[Cp] Country of publication:Canada
[La] Language:eng
[Ab] Abstract:Leaf-level anatomical variation is readily apparent within tall tree crowns, yet the relative importance of water and light availability in controlling this variation remains unclear. Sitka spruce (Picea sitchensis, (Bong.) Carr.) thrives in temperate rainforests of the Pacific Northwest, where it has historically reached heights >100 m, despite rarely living more than 400 years alongside redwoods that are five times older. We examined leaves of trees up to 97 m tall using a combination of transverse sections, longitudinal sections, epidermal imprints and whole-leaf measurements to explore the combined effects of water stress and light availability on leaf development in P. sitchensis. In contrast to the situation in tall Cupressaceae, light availability-not hydraulic limitation-is the primary ecological driver of leaf-level anatomical variation in P. sitchensis. While height-associated decreases in leaf length and mesoporosity are best explained by hydrostatic constraints on leaf elongation, the majority of anatomical traits we measured reflect acclimation to light availability, including increases in leaf width and vascular tissue areas in the brightest parts of the crown. Along with these changes, the appearance of abaxial stomata in the bright upper crown, and the arrangement of mesophyll in uniseriate, transverse plates-with radially arranged apoplastic pathways leading directly to stomata before bridging them with a V-shaped cell-may enhance gas exchange and hydraulic conductivity. This suite of leaf traits suggests an adaptive strategy that maximizes photosynthesis at the expense of water-stress tolerance. Anatomical investigations spanning the height gradient in tall tree crowns build our understanding of mechanisms underlying among-species variation in growth rates, life spans, and potential responses to climate change.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1704
[Cu] Class update date: 171031
[Lr] Last revision date:171031
[St] Status:In-Process
[do] DOI:10.1093/treephys/tpx027

  4 / 603 MEDLINE  
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[PMID]: 28751047
[Au] Autor:Silva IS; Nicolau LAD; Sousa FBM; Araújo S; Oliveira AP; Araújo TSL; Souza LKM; Martins CS; Aquino PEA; Carvalho LL; Silva RO; Rolim-Neto PJ; Medeiros JVR
[Ad] Address:Laboratory of Experimental Physiopharmacology, Federal University of Piauí, Parnaíba, Piauí, Brazil; Post-graduation Program in Immunology, University of São Paulo, São Paulo, SP, Brazil.
[Ti] Title:Evaluation of anti-inflammatory potential of aqueous extract and polysaccharide fraction of Thuja occidentalis Linn. in mice.
[So] Source:Int J Biol Macromol;105(Pt 1):1105-1116, 2017 Dec.
[Is] ISSN:1879-0003
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:Inflammation is a protective reaction of the microcirculation. However, sustained inflammation can lead to undesired effects. Thuja occidentalis Linn has many pharmacological properties but has no anti-inflammatory activity described. Thus, this study aims evaluating the anti-inflammatory activity of the aqueous extract (AE) and the polysaccharide fraction (PLS) of T. occidentalis L. in mice. The results of our evaluations in various experimental models indicated that AE and PLS (3, 10, and 30mg/kg, i.p.) reduced (pË‚0.05) paw edema induced by carrageenan, dextran sulfate (DEX), compound 48/80, serotonin (5-HT), bradykinin (BK), histamine (HIST), and prostaglandin E2 (PGE2). Furthermore, it inhibited neutrophils recruitment; decreased MPO activity, tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) levels, vascular permeability, nitrite concentration, and MDA concentration; and maintained the GSH levels in the peritoneal exudate. The AE and PLS reduced neutrophil infiltration and cyclooxygenase (COX)-2 and inducible nitric oxide synthase (iNOS) immunostaining in paw tissue. Treatment with the AE and PLS (300mg/kg) did not induce gastric toxicity. In conclusion, these results show that the AE and PLS reduced the inflammatory response by inhibiting vascular and cellular events, inhibiting pro-inflammatory cytokine production, and reducing oxidative stress. Furthermore, they did not induce gastric toxicity at high doses.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1707
[Cu] Class update date: 171024
[Lr] Last revision date:171024
[St] Status:In-Process

  5 / 603 MEDLINE  
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[PMID]: 28817600
[Au] Autor:Liu M; Feng Z; Zhang Z; Ma C; Wang M; Lian BL; Sun R; Zhang L
[Ad] Address:Precision Forestry Key Laboratory of Beijing, Beijing Forestry University, Beijing,China.
[Ti] Title:Development and evaluation of height diameter at breast models for native Chinese Metasequoia.
[So] Source:PLoS One;12(8):e0182170, 2017.
[Is] ISSN:1932-6203
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Accurate tree height and diameter at breast height (dbh) are important input variables for growth and yield models. A total of 5503 Chinese Metasequoia trees were used in this study. We studied 53 fitted models, of which 7 were linear models and 46 were non-linear models. These models were divided into two groups of single models and multivariate models according to the number of independent variables. The results show that the allometry equation of tree height which has diameter at breast height as independent variable can better reflect the change of tree height; in addition the prediction accuracy of the multivariate composite models is higher than that of the single variable models. Although tree age is not the most important variable in the study of the relationship between tree height and dbh, the consideration of tree age when choosing models and parameters in model selection can make the prediction of tree height more accurate. The amount of data is also an important parameter what can improve the reliability of models. Other variables such as tree height, main dbh and altitude, etc can also affect models. In this study, the method of developing the recommended models for predicting the tree height of native Metasequoias aged 50-485 years is statistically reliable and can be used for reference in predicting the growth and production of mature native Metasequoia.
[Mh] MeSH terms primary: Cupressaceae
Models, Theoretical
Trees
[Mh] MeSH terms secundary: Algorithms
China
Cupressaceae/growth & development
Geography
Reproducibility of Results
Trees/growth & development
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1710
[Cu] Class update date: 171018
[Lr] Last revision date:171018
[Js] Journal subset:IM
[Da] Date of entry for processing:170817
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0182170

  6 / 603 MEDLINE  
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[PMID]: 28965257
[Au] Autor:Uguz U; Guvensen A; Tort NS
[Ad] Address:Department of Biology, Faculty of Science, Ege University, 35100, Izmir, Turkey. ulas.uguz@ege.edu.tr.
[Ti] Title:Annual and intradiurnal variation of dominant airborne pollen and the effects of meteorological factors in Çesme (Izmir, Turkey).
[So] Source:Environ Monit Assess;189(10):530, 2017 Sep 30.
[Is] ISSN:1573-2959
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:In this present study, airborne pollen in Çesme was investigated between February 17, 2012 and February 17, 2014 using the volumetric method. Çesme, one of Turkey's most important tourism centers, which attracts numerous local and foreign tourists each year, is a district of Izmir, a province in the western part of Turkey. During the 2-year study, 12,905 pollen grains belonging to 64 taxa (33 arboreal, 31 non-arboreal plants) were detected. However, the 2-year data results revealed that the taxa with the pollen concentration more than 4% in the atmosphere were Cupressaceae/Taxaceae (4268 pollen, 33.07%), Olea europaea (1614 pollen grains, 12.51%), Pinaceae (1085 pollen grains, 8.41%), Quercus spp. (1081 pollen grains, 8.38%), Pistacia spp. (743 pollen grains, 5.76%), and Poaceae (557 pollen grains, 4.32%), all of which comprised 72.44% of the total count. The relationship between the daily pollen counts belonging to these six taxa and the hourly average temperature (°C), daily precipitation (mm), relative humidity (%), and wind speed (km/h) was assessed using the Spearman correlation test, and significant results were determined. During the study, the intradiurnal distribution of the aforementioned pollen varied. The highest pollen concentration was detected between 11:00 a.m. and 6:00 p.m. (first year 30.3%; second year 30.1%).
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1710
[Cu] Class update date: 171003
[Lr] Last revision date:171003
[St] Status:In-Process
[do] DOI:10.1007/s10661-017-6238-2

  7 / 603 MEDLINE  
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[PMID]: 28502749
[Au] Autor:Mas S; Oeo-Santos C; Cuesta-Herranz J; Díaz-Perales A; Colás C; Fernández J; Barber D; Rodríguez R; de Los Ríos V; Barderas R; Villalba M
[Ad] Address:Dpto. Bioquímica y Biología Molecular I, Universidad Complutense de Madrid, Madrid, Spain.
[Ti] Title:A relevant IgE-reactive 28kDa protein identified from Salsola kali pollen extract by proteomics is a natural degradation product of an integral 47kDa polygalaturonase.
[So] Source:Biochim Biophys Acta;1865(8):1067-1076, 2017 08.
[Is] ISSN:0006-3002
[Cp] Country of publication:Netherlands
[La] Language:eng
[Ab] Abstract:A highly prevalent IgE-binding protein band of 28kDa is observed when Salsola kali pollen extract is incubated with individual sera from Amaranthaceae pollen sensitized patients. By an immunoproteomic analysis of S. kali pollen extract, we identified this protein band as an allergenic polygalacturonase enzyme. The allergen, named Sal k 6, exhibits a pI of 7.14 and a molecular mass of 39,554.2Da. It presents similarities to Platanaceae, Poaceae, and Cupressaceae allergenic polygalacturonases. cDNA-encoding sequence was subcloned into the pET41b vector and produced in bacteria as a His-tag fusion recombinant protein. The far-UV CD spectrum determined that rSal k 6 was folded. Immunostaining of the S. kali pollen protein extract with a rSal k 6-specific pAb and LC-MS/MS proteomic analyses confirmed the co-existence of the 28kDa band together with an allergenic band of about 47kDa in the pollen extract. Therefore, the 28kDa was assigned as a natural degradation product of the 47kDa integral polygalacturonase. The IgE-binding inhibition to S. kali pollen extract using rSal k 6 as inhibitor showed that signals directed to both protein bands of 28 and 47kDa were completely abrogated. The average prevalence of rSal k 6 among the three populations analyzed was 30%, with values correlating well with the levels of grains/m of Amaranthaceae pollen. Sal k 6 shares IgE epitopes with Oleaceae members (Fraxinus excelsior, Olea europaea and Syringa vulgaris), with IgE-inhibition values ranging from 20% to 60%, respectively. No IgE-inhibition was observed with plant-derived food extracts.
[Mh] MeSH terms primary: Antigens, Plant/metabolism
Glycosides/metabolism
Immunoglobulin E/metabolism
Plant Proteins/metabolism
Pollen/metabolism
Salsola/metabolism
[Mh] MeSH terms secundary: Amaranthaceae/chemistry
Amaranthaceae/metabolism
Amino Acid Sequence
Antigens, Plant/chemistry
Base Sequence
Cloning, Molecular/methods
Cross Reactions/physiology
Glycosides/chemistry
Oleaceae/chemistry
Oleaceae/metabolism
Plant Proteins/chemistry
Pollen/chemistry
Protein Binding/physiology
Proteomics/methods
Recombinant Fusion Proteins/chemistry
Recombinant Fusion Proteins/metabolism
Salsola/chemistry
Sequence Alignment
[Pt] Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Name of substance:0 (Antigens, Plant); 0 (Glycosides); 0 (Plant Proteins); 0 (Recombinant Fusion Proteins); 37341-29-0 (Immunoglobulin E)
[Em] Entry month:1709
[Cu] Class update date: 170926
[Lr] Last revision date:170926
[Js] Journal subset:IM
[Da] Date of entry for processing:170515
[St] Status:MEDLINE

  8 / 603 MEDLINE  
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[PMID]: 28917013
[Au] Autor:Flonard M; Lo E; Levetin E
[Ad] Address:Department of Biological Science, The University of Tulsa, Tulsa, OK, 74104, USA.
[Ti] Title:Increasing Juniperus virginiana L. pollen in the Tulsa atmosphere: long-term trends, variability, and influence of meteorological conditions.
[So] Source:Int J Biometeorol;, 2017 Sep 15.
[Is] ISSN:1432-1254
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:In the Tulsa area, the Cupressaceae is largely represented by eastern red cedar (Juniperus virginiana L.). The encroachment of this species into the grasslands of Oklahoma has been well documented, and it is believed this trend will continue. The pollen is known to be allergenic and is a major component of the Tulsa atmosphere in February and March. This study examined airborne Cupressaceae pollen data from 1987 to 2016 to determine long-term trends, pollen seasonal variability, and influence of meteorological variables on airborne pollen concentrations. Pollen was collected through means of a Burkard sampler and analyzed with microscopy. Daily pollen concentrations and yearly pollen metrics showed a high degree of variability. In addition, there were significant increases over time in the seasonal pollen index and in peak concentrations. These increases parallel the increasing population of J. virginiana in the region. Pollen data were split into pre- and post-peak categories for statistical analyses, which revealed significant differences in correlations of the two datasets when analyzed with meteorological conditions. While temperature and dew point, among others were significant in both datasets, other factors, like relative humidity, were significant only in one dataset. Analyses using wind direction showed that southerly and southwestern winds contributed to increased pollen concentrations. This study confirms that J. virginiana pollen has become an increasing risk for individuals sensitive to this pollen and emphasizes the need for long-term aerobiological monitoring in other areas.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1709
[Cu] Class update date: 170916
[Lr] Last revision date:170916
[St] Status:Publisher
[do] DOI:10.1007/s00484-017-1444-8

  9 / 603 MEDLINE  
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[PMID]: 28273170
[Au] Autor:Mohanty RP; Buchheim MA; Anderson J; Levetin E
[Ad] Address:Department of Biological Sciences, The University of Tulsa, Tulsa, Oklahoma, United States of America.
[Ti] Title:Molecular analysis confirms the long-distance transport of Juniperus ashei pollen.
[So] Source:PLoS One;12(3):e0173465, 2017.
[Is] ISSN:1932-6203
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Although considered rare, airborne pollen can be deposited far from its place of origin under a confluence of favorable conditions. Temporally anomalous records of Cupressacean pollen collected from January air samples in London, Ontario, Canada have been cited as a new case of long-distance transport. Data on pollination season implicated Juniperus ashei (mountain cedar), with populations in central Texas and south central Oklahoma, as the nearest source of the Cupressacean pollen in the Canadian air samples. This finding is of special significance given the allergenicity of mountain cedar pollen. While microscopy is used extensively to identify particles in the air spora, pollen from all members of the Cupressaceae, including Juniperus, are morphologically indistinguishable. Consequently, we implemented a molecular approach to characterize Juniperus pollen using PCR in order to test the long-distance transport hypothesis. Our PCR results using species-specific primers confirmed that the anomalous Cupressacean pollen collected in Canada was from J. ashei. Forward trajectory analysis from source areas in Texas and the Arbuckle Mountains in Oklahoma and backward trajectory analysis from the destination area near London, Ontario were completed using models implemented in HYSPLIT4 (Hybrid Single-Particle Lagrangian Integrated Trajectory). Results from these trajectory analyses strongly supported the conclusion that the J. ashei pollen detected in Canada had its origins in Texas or Oklahoma. The results from the molecular findings are significant as they provide a new method to confirm the long-distance transport of pollen that bears allergenic importance.
[Mh] MeSH terms primary: Juniperus/genetics
Pollen/genetics
[Mh] MeSH terms secundary: DNA, Plant
Oklahoma
Ontario
Pollination
Polymerase Chain Reaction
Texas
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (DNA, Plant)
[Em] Entry month:1708
[Cu] Class update date: 170825
[Lr] Last revision date:170825
[Js] Journal subset:IM
[Da] Date of entry for processing:170308
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0173465

  10 / 603 MEDLINE  
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[PMID]: 27989219
[Au] Autor:Wu XD; Zhong WW; Ding LF; Tu WC; Yang H; Gong X; Peng LY; Li Y; Xu ZZ; Zhao QS
[Ad] Address:a State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China.
[Ti] Title:Sesquiterpenoids from the twigs and leaves of Fokienia hodginsii.
[So] Source:J Asian Nat Prod Res;19(7):666-672, 2017 Jul.
[Is] ISSN:1477-2213
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:A rare carotane-type sesquiterpenoid, forkienin A (1), a new eudesmane-type sesquiterpenoid, forkienin B (2), and a new natural eudesmane-type sesquiterpenoid, forkienin C (3), were isolated from the twigs and leaves of Fokienia hodginsii, along with eight known sesquiterpenoids. The structures of the new compounds were elucidated on the basis of their spectroscopic analysis, including 1D and 2D NMR methods. All compounds were evaluated for cytotoxicity against HL-60, SMMC-7721, A-549, MCF-7, and SW480 cell lines.
[Mh] MeSH terms primary: Antineoplastic Agents, Phytogenic/isolation & purification
Plant Leaves/chemistry
Plant Stems/chemistry
Sesquiterpenes, Eudesmane/isolation & purification
Sesquiterpenes/isolation & purification
[Mh] MeSH terms secundary: Antineoplastic Agents, Phytogenic/chemistry
Antineoplastic Agents, Phytogenic/pharmacology
Drug Screening Assays, Antitumor
Drugs, Chinese Herbal/chemistry
HL-60 Cells
Humans
Molecular Structure
Sesquiterpenes/chemistry
Sesquiterpenes/pharmacology
Sesquiterpenes, Eudesmane/chemistry
Sesquiterpenes, Eudesmane/pharmacology
[Pt] Publication type:JOURNAL ARTICLE
[Nm] Name of substance:0 (Antineoplastic Agents, Phytogenic); 0 (Drugs, Chinese Herbal); 0 (Sesquiterpenes); 0 (Sesquiterpenes, Eudesmane); 0 (forkienin A); 0 (forkienin B); 473-11-0 (eudesmane)
[Em] Entry month:1708
[Cu] Class update date: 170809
[Lr] Last revision date:170809
[Js] Journal subset:IM
[Da] Date of entry for processing:161219
[St] Status:MEDLINE
[do] DOI:10.1080/10286020.2016.1247350


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