@article{2c0f5bd7bb194b4084c4b311387fadae,
title = "Vitamin D and COPD: seasonal variation is important",
keywords = "Aged, Female, Humans, Male, Middle Aged, Pulmonary Disease, Chronic Obstructive, Seasons, Vitamin D, Vitamin D Deficiency",
author = "Ampikaipakan, {Sundari N.} and Hughes, {David A.} and Hughes, {Jackie C.} and Talar Amen and Graham Bentham and Andrew Wilson",
year = "2011",
month = jun,
doi = "10.1136/thx.2009.134338",
language = "English",
volume = "66",
pages = "541--542",
journal = "Thorax",
issn = "0040-6376",
publisher = "BMJ Publishing Group",
number = "6",
}