6Petti S.Lifestyle risk factors for oral cancer.Oral Oncol,2009,45(4-5):340-350.
7George A,Varghese C,Sankaranarayanan R,et al.Use of tobacco and alcoholic beverages by children and teenagers in a low-income coastal community in South India.J Cancer Edu,1994,9(2):111-113.
8Prabhu NT,Warnakulasuriya K,Gelbier S,et al.Betel quid chewing among Bangladeshi adolescents living in East London.Int J Paediatr Dent,2001,11(1):18-24.
9Gupta PC,Warnakulasuriya S.Global epidemiology of areca nut usage.Addict Biol,2002,7(1):77-83.
10Shah SM,Merchant AT,Luby SP,et al.Addicted schoolchildren:prevalence and characteristics of areca nut chewer among primary school children in Karachi,Pakistan.J Paediatr Child Health,2002,38(5):507-510.
