Betel quid chewing.
Pemberton
M N
MN
D001114:Areca / Q000009:adverse effects*; D006528:Carcinoma, Hepatocellular / Q000209:etiology*; D006801:Humans; D008113:Liver Neoplasms / Q000209:etiology*; D009062:Mouth Neoplasms / Q000209:etiology; D009914:Oral Submucous Fibrosis / Q000209:etiology