RT Journal Article
SR Electronic
T1 Vitamin D and COPD: seasonal variation is important
JF Thorax
JO Thorax
FD BMJ Publishing Group Ltd and British Thoracic Society
SP 541
OP 542
DO 10.1136/thx.2009.134338
VO 66
IS 6
A1 Sundari N Ampikaipakan
A1 David A Hughes
A1 Jackie C Hughes
A1 Talar Amen
A1 Graham Bentham
A1 Andrew M Wilson
YR 2011
UL http://thorax.bmj.com/content/66/6/541.abstract
AB