%0 Journal Article %T “Vitamin D and skeletal muscle strength and endurance in COPD.” Abigail S. Jackson, Dinesh Shrikrishna, Julia L. Kelly, Samuel V. Kemp, Nicholas Hart, John Moxham, Michael I. Polkey, Paul Kemp and Nicholas S. Hopkinson.Eur Respir J2013;41: 309 - 316。2013% % D R 10.1183/09031936.50043112 %J European Respiratory Journal %P 998-998 %V 41 %N 4 %U //www.qdcxjkg.com/content/erj/41/4/998.full.pdf