Mass photofluorographic surveys and their significance in the future control of disease.
D002318:Cardiovascular Diseases; D006801:Humans; D008175:Lung Neoplasms; D008400:Mass Chest X-Ray; D013896:Thoracic Diseases; D014376:Tuberculosis; D014397:Tuberculosis, Pulmonary
CARDIOVASCULAR DISEASES; LUNG NEOPLASMS; MASS CHEST X-RAY; THORACIC DISEASES; TUBERCULOSIS, PULMONARY