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Mathew B, Sankaranarayanan R, Wesley R, Joseph A, Nair MK.Mathew B, et al.Eur J Cancer B Oral Oncol. 1995 May;31B(3):193-6. doi: 10.1016/0964-1955(95)00016-b.Eur J Cancer B Oral Oncol. 1995.PMID: 7549760Clinical Trial.