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2. Oral cancer and precancer;Pindborg,1980
3. Mycotic infection in oral leukoplakia;Jepsen;Acta Odontol Scand,1965
4. International seminar on oral leukoplakia and associated lesions related to tobacco habits;Axell,1984
5. Chronic oral candidiasis and leukoplakia;Cawson;Oral Surg Oral Med Oral Pathol,1966