tabagisme (2) association (2) âge (2) cancer (2) Brésil (2) Case (2) Cancer (2) Methods (2) Cases (2) Mouth--Cancer (2) Ci (Chinese poetry) (2) Tumors (2) Social groups (2) Smoking (2) Sex (2) Mouth (2) Manufacturers' agents (2) Grammar, Comparative and general--Case (2) Commission merchants (2) Case (2) Cancer (2) Age (2) Cases (2) Methods (2) Age (2) Risk factors (2) puits (1) tendance (1) tabac (1) risque (1)