1. Bartsch H, Rojas M, Nair U, et al. Genetic cancer susceptibility and DNA adducts: studies in smokers, tobacco chewers, and coke oven workers. Cancer Detect Prev 1999;23:445-53.
2. Stich HF, Rosin MP, Hornby AP, et al. Remission of oral leukoplakias and micronuclei in tobacco/betel quid chewers treated with beta-carotene and with beta-carotene plus vitamin A. Int J Cancer 1988;42:195-9.
3. Garewal HS, Katz RV, Meyskens F, et al. ß-Carotene produces sustained remission in patients with oral leukoplakia. Arch Otolaryngol Head Neck Surg 1999;125:1305-10.
4. Liede K, Hietanen J, Saxen L, et al. Long-term supplementation with alpha-tocopherol and beta-carotene and prevalence of oral mucosal lesions in smokers. Oral Dis 1998;4:78-83.
5. Toma S, Benso S, Albanese E, et al. Treatment of oral leukoplakia with beta-carotene. Oncology 1992;49:77-81.
6. Garewal HS, Meyskens FL Jr, Killen D, et al. Response of oral leukoplakia to beta-carotene. J Clin Oncol 1990;8:1715-20.
7. Lippman SM, Batsakis JG, Toth BB, et al. Comparison of low-dose isotretinoin with beta carotene to prevent oral carcinogenesis. N Engl J Med 1993;328:15-20.
8. Johnson J, Ringsdorf W, Cheraskin E. Relationship of vitamin A and oral leukoplakia. Arch Derm 1963;88:607-12.
9. Stich HF, Mathews B, Sankaranarayanan R, Nair MK. Remission of precancerous lesions in the oral cavity of tobacco chewers and maintenance of the protective effect of ß-carotene or vitamin A. Am J Clin Nutr 1991;53:298S-304S.
10. Stich HF, Rosin MP, Hornby AP, et al. Remission of oral leukoplakias and micronuclei in tobacco/betel quid chewers treated with beta-carotene and with beta-carotene plus vitamin A. Int J Cancer 1988;42:195-9.
11. Garewal HS, Katz RV, Meyskens F, et al. ß-Carotene produces sustained remission in patients with oral leukoplakia. Arch Otolaryngol Head Neck Surg 1999;125:1305-10.
12. Liede K, Hietanen J, Saxen L, et al. Long-term supplementation with alpha-tocopherol and beta-carotene and prevalence of oral mucosal lesions in smokers. Oral Dis 1998;4:78-83.
13. Toma S, Benso S, Albanese E, et al. Treatment of oral leukoplakia with beta-carotene. Oncology 1992;49:77-81.
14. Garewal HS, Meyskens FL Jr, Killen D, et al. Response of oral leukoplakia to beta-carotene. J Clin Oncol 1990;8:1715-20.
15. Lippman SM, Batsakis JG, Toth BB, et al. Comparison of low-dose isotretinoin with beta carotene to prevent oral carcinogenesis. N Engl J Med 1993;328:15-20.
16. Johnson J, Ringsdorf W, Cheraskin E. Relationship of vitamin A and oral leukoplakia. Arch Derm 1963;88:607-12.
17. Stich HF, Mathews B, Sankaranarayanan R, Nair MK. Remission of precancerous lesions in the oral cavity of tobacco chewers and maintenance of the protective effect of ß-carotene or vitamin A. Am J Clin Nutr 1991;53:298S-304S.
18. Li N, Sun Z, Han C, Chen J. The chemopreventive effects of tea on human oral precancerous mucosa lesions. Proc Soc Exp Biol Med 1999;220:218-24.
19. Garewal H. Antioxidants in oral cancer prevention. Am J Clin Nutr 1995;62(suppl):1410S-6S [review].
20. Kaugars GE, Silverman S Jr, Lovas JG, et al. A clinical trial of antioxidant supplements in the treatment of oral leukoplakia. Oral Surg Oral Med Oral Pathol 1994 Oct;78:462-8.
21. Zaridze D, Evstifeeva T, Boyle P. Chemoprevention of oral leukoplakia and chronic esophagitis in an area of high incidence of oral and esophageal cancer. Ann Epidemiol 1993;3:225-34.
22. Benner SE, Winn RJ, Lippman SM, et al. Regression of oral leukoplakia with alpha-tocopherol: a community clinical oncology program chemoprevention study. J Natl Cancer Inst 1993;85:44-7.
23. Mihail RC. Oral leukoplakia caused by cinnamon food allergy. J Otolaryngol 1992 Oct:366-7.
24. Gupta PC, Hebert JR, Bhonsle RB, et al. Dietary factors in oral leukoplakia and submucous fibrosis in a population-based case control study in Gujarat, India. Oral Dis 1998;4:200-6.
25. Cianfriglia F, Manieri A, Di Gregorio DA, Di Iorio AM. Retinol dietary intake and oral leukoplakia development. J Exp Clin Cancer Res 1998;17:331-6.
26. Ramaswamy G, Rao VR, Kumaraswamy SV, Anantha N. Serum vitamins' status in oral leukoplakias--a preliminary study. Eur J Cancer B Oral Oncol 1996;32B:120-2.
27. Gupta PC. Epidemiologic study of the association between alcohol habits and oral leukoplakia. Community Dent Oral Epidemiol 1984;12:47-50.
28. Macigo FG, Mwaniki DL, Guthua SW. Influence of dose and cessation of kiraiku, cigarettes and alcohol use on the risk of developing oral leukoplakia. Eur J Oral Sci 1996;104:498-502.
29. Evstifeeva TV, Zaridze DG. Nass use, cigarette smoking, alcohol consumption and risk of oral and oesophageal precancer. Eur J Cancer B Oral Oncol 1992;28B:29-35.