The utility of toluidine blue application in potentially malignant epithelial oral lesions. - Onofre, Mirian Aparecida [UNESP]; Sposto, M. R.; Navarro, Cláudia Maria [UNESP]; Massucato, Elaine Maria Sgavioli [UNESP] (Int Amer Assoc Dental Researchi, 2003)