Socioeconomic Status and Health-Related Quality of Life of Patients with Chronic Obstructive Pulmonary Disease
2002 ◽
Vol 166
(5)
◽
pp. 680-685
◽
2007 ◽
Vol 135
(9-10)
◽
pp. 547-553
◽
2011 ◽
Vol 26
(2)
◽
pp. 219-227
◽