The Philadelphia Pulmonary Neoplasm Research Project William Weiss, M.D., Herbert Seidman, M.B.A., Katharine R. Boucot, M.D. CHEST Volume 73, Issue 1, Pages 57-61 (January 1978) DOI: 10.1378/chest.73.1.57 Copyright © 1978 The American College of Chest Physicians Terms and Conditions
Figure 1 Prevalence of expectoration during 48 months prior to and at radiographic detection in 33 cases of lung cancer (solid circles) and matched controls (open circles) CHEST 1978 73, 57-61DOI: (10.1378/chest.73.1.57) Copyright © 1978 The American College of Chest Physicians Terms and Conditions
Figure 2 Prevalence of chronic cough during 48 months prior to and at radiographic detection in 33 cases of lung cancer (solid circles) and matched controls (open circles) CHEST 1978 73, 57-61DOI: (10.1378/chest.73.1.57) Copyright © 1978 The American College of Chest Physicians Terms and Conditions
Figure 3 Prevalence of dyspnea during 48 months prior to and at radiographic detection in 33 cases of lung cancer (solid circles) and matched controls (open circles) CHEST 1978 73, 57-61DOI: (10.1378/chest.73.1.57) Copyright © 1978 The American College of Chest Physicians Terms and Conditions