1Pack years; 2Non-bronchogenic carcinoma individual; 3White; 4African-American; 5Non-smoker; 6Not available; 7Hispanic; 8Bronchogenic carcinoma individual; 9Non-small cell lung cancer; 10Squamous carcinoma; 11Small cell lung cancer; 12Carcinoma-in-situ; 13Adenocarcinoma;14Bronchogenic Cancer, histology not specified; 15Poorly differentiated carcinoma.