Characteristics of physical activities in daily life in chronic obstructive pulmonary disease.
Am J Respir Crit Care Med. 2005 May 1;171(9):972-7. doi: 10.1164/rccm.200407-855OC. Epub 2005 Jan 21.
Am J Respir Crit Care Med. 2005.
PMID: 15665324