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  1. Oral Cavity, Oropharyngeal, Hypopharyngeal, and Laryngeal Cancers Prevention (PDQ®) - PDQ Cancer Information Summaries .... 
    https://www.ncbi.nlm.nih.gov/books/NBK65979
    ... three primary components of betel quid (betel leaf, areca nut, and lime), the areca nut is the only one considered to be ... Chewing Betel quid is composed of betel leaf, areca nut, and lime; gutka is betel quid with ...