1. Ferlay J, Bray F, Pisani P, Parkin DM. GLOBOCAN 2002: Cancer incidence, mortality and prevalence worldwide. IARC CancerBase. No. 5 version 2.0 Lyon: IARC Press; 2004.
2. An overview of cancer survival in developing countries;Sankaranarayanan,1998
3. Betel quid without tobacco as a risk factor for oral precancers;Jacob;Oral Oncol,2004
4. IARC Monographs on Evaluation of the Carcinogenic Risks to Humans. Tobacco smoke and involuntary smoking. Lyon, France: International Agency for Research on Cancer vol. 83; 2004.
5. IARC Monographs on Evaluation of the Carcinogenic Risks to Humans. Betel-quid and areca-nut chewing and some areca-nut derived nitrosamines. Lyon, France: International Agency for Research on Cancer, vol. bf 85; 2004.