Relationship of vitamin D status to adult lung function and COPD
Seif O Shaheen, Karen A Jameson, Sian M Robinson, Barbara J Boucher, Holly E Syddall, Avan Aihie Sayer, Cyrus Cooper, John W Holloway, Elaine M Dennison
Thorax Aug 2011, 66 (8) 692-698; DOI: 10.1136/thx.2010.155234