title: When bad things happen to good studies.
authors.forename: Judith B
authors.initials: JB
authors.lastname: Manola
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Gray
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000401:mortality*; D002423:Cause of Death; D015897:Comorbidity; D005260:Female; D006258:Head and Neck Neoplasms / Q000401:mortality*; D006801:Humans; D008297:Male