Prevalence, cause, and location of palatal fistula in operated complete unilateral cleft lip and palate: retrospective study - Passos, Vivian de Agostino Biella; Carrara, Cleide Felicio Carvalho; Dalben, Gisele da Silva; Costa, Beatriz; Gomide, Márcia Ribeiro (The Cleft Palate-Craniofacial Journal, 2014)