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Kaplan–Meier curve of the cumulative incidence of various head and neck cancers in the original cohort of healthy males and females: (A) all head and neck cancers; (B) salivary gland cancer, (C) sinonasal cancer, (D) nasopharyngeal cancer, (E) oral cancer, (F) oropharyngeal cancer, (G) hypopharyngeal cancer, and (H) laryngeal cancer.
