Fan VS, Bridevaux PO, McDonell MB, Fihn SD, Besser LM, Au DH. Regional variation in health status among chronic obstructive pulmonary disease patients. Respiration. 2011;81(1):9-17. Epub 2010 Aug 17.
Fan VS, Bridevaux PO, McDonell MB, Fihn SD, Besser LM, Au DH. Regional variation in health status among chronic obstructive pulmonary disease patients. Respiration. 2011;81(1):9-17. Epub 2010 Aug 17.