Comparative immunohistochemical study of the presence of mast cells in apical granulomas and periapical cysts: possible role of mast cells in the course of human periapical lesions - Rodini, Camila de Oliveira; Batista, Aline Carvalho; Lara, Vanessa Soares (Oral Surgery Oral Medicine Oral Pathology, Oral Radiology and Endodontics, 2004)