Smokeless tabacco.
Ellison
James A
JA
D006801:Humans; D007822:Laryngeal Neoplasms / Q000209:etiology; D009062:Mouth Neoplasms / Q000209:etiology; D010610:Pharyngeal Neoplasms / Q000209:etiology; D018570:Risk Assessment / Q000706:statistics & numerical data; D014030:Tobacco, Smokeless / Q000009:adverse effects* / Q000145:classification