Validity of Toluidine Blue test as a diagnostic tool for high risk oral potentially malignant disorders- a multicentre study in Sri Lanka von Jayasinghe, R.D., Hettiarachchi, P.V.K.S., Amugoda, Dilrukshi, Kumaraarachchi, Menaka, Liyanage, R.L.P.R., Siriwardena, B.S.M.S., Gunasena, Ranjith, Karunatilake, A.H.T.S., Amarasinghe, H.K.

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