The use of tobacco-free betel-quid in conjunction with alcohol/tobacco impacts early-onset age and carcinoma distribution for upper aerodigestive tract cancer - Lee, C H; Lee, K W; Fang, F M; Wu, D C; Shieh, T Y; Huang, H L; Chen, C H; Chen, P H; Chen, M K; Kuo, S J; Chang, C H; Tsai, Y S; Chiang, S L; Tu, H P; Chen, B H; Ko, Y C (J Oral Pathol Med, 2011)