Prognostic factors and survival analysis in a sample of oral squamous cell carcinoma patients - Oliveira, Lucinei Roberto; Ribeiro-Silva, Alfredo; Costa, João Paulo Oliveira; Simões, Aguinaldo Luiz; Sala, Miguel Angel; Zucoloto, Sérgio (Oral Surgery, Orla Medicine, Oral Pathology, Oral Radiology and Endodontics, 2008)