A retrospective study of etiological factors in cancer of the mouth, pharynx, and larynx.
D006801:Humans; D007822:Laryngeal Neoplasms; D007830:Larynx; D009062:Mouth Neoplasms; D009369:Neoplasms; D010610:Pharyngeal Neoplasms; D010614:Pharynx; D012189:Retrospective Studies
LARYNX/neoplasms; MOUTH/neoplasms; PHARYNX/neoplasms