Can moderate chronic obstructive pulmonary disease be diagnosed by historical and physical findings alone?
Badgett RG, Tanaka DJ, Hunt DK, Jelley MJ, Feinberg LE, Steiner JF, Petty TL. Can moderate chronic obstructive pulmonary disease be diagnosed by historical and physical findings alone? Am J Med. 1993 Feb; 94(2):188-96.