PTCH1 gene mutations in exon 17 and loss of heterozygosity on D9S180 microsatellite in sporadic and inherited human basal cell carcinomas - Santos, Daniela C C; Zaphiropoulos, Peter G; Festa Neto, Cyro; Pimentel, Eugênio R A; Sanches Junior, José Antonio; Ruiz, Itamar R G (International journal of dermatology, 2011)