Diagnosis and management of stable chronic obstructive pulmonary disease: a clinical practice guideline from the American College of Physicians.

Qaseem A, Snow V, Shekelle P, Sherif K, Wilt TJ, Weinberger S, Owens DK. Diagnosis and management of stable chronic obstructive pulmonary disease: a clinical practice guideline from the American College of Physicians. Ann Intern Med. 2007 Nov 6; 147(9):633-8.

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