Primary care physician perceptions on the diagnosis and management of chronic obstructive pulmonary disease in diverse regions of the world
2009 ◽
Vol 6
(6)
◽
pp. 446-451
◽
2016 ◽
Vol 13
(3)
◽
pp. 240-246
◽
2008 ◽
Vol 121
(7)
◽
pp. S3-S12
◽