The Philadelphia Pulmonary Neoplasm Research Project.
D003365:Costs and Cost Analysis; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis / Q000401:mortality / Q000601:surgery; D008403:Mass Screening; D009362:Neoplasm Metastasis; D010414:Pennsylvania; D012106:Research; D013183:Sputum / Q000166:cytology; D011795:Surveys and Questionnaires; D013997:Time Factors