Survival of Massachusetts physicians according to smoking habits.
D001984:Bronchial Neoplasms; D002277:Carcinoma; D002283:Carcinoma, Bronchogenic; D006184:Habits; D008175:Lung Neoplasms; D008404:Massachusetts; D012907:Smoking
BRONCHIAL NEOPLASMS; CARCINOMA, BRONCHOGENIC; LUNG NEOPLASMS; SMOKING