1. Vitamin D and COPD: seasonal variation is important. Issue 6 (26th June 2010) Authors: Ampikaipakan, Sundari N; Hughes, David A; Hughes, Jackie C; Amen, Talar; Bentham, Graham; Wilson, Andrew M Journal: Thorax Issue: Volume 66:Issue 6(2011) Page Start: 541 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗