Keywords: |
adult; cancer chemotherapy; aged; major clinical study; cigarette smoking; carcinoma, squamous cell; cancer risk; cancer radiotherapy; cancer diagnosis; cancer susceptibility; proportional hazards models; risk factors; smoking; risk factor; cancer mortality; risk assessment; disease severity; head and neck neoplasms; predictive value of tests; malignant neoplastic disease; sex difference; high risk population; neoplasms, second primary; analysis of variance; chromosomes, human; race difference; neoplasms, multiple primary; mutagenesis; alcohol drinking; mutagens; middle age; digestive system; human; male; female; article; support, u.s. gov't, p.h.s.
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