1. Stomatology Department Professor; Universidade Federal do Paraná; Curitiba Paraná Brazil
2. Oral and Maxillofacial Surgery Service of the Erasto Gaertner Hospital; Curitiba Paraná Brazil
3. Chief of Oral and Maxillofacial Surgery Service of the Erasto Gaertner Hospital; Curitiba Paraná Brazil
4. Head and Neck Surgery Department of Erasto Gaertner Hospital; Curitiba Paraná Brazil
5. Bone Marrow Transplant Unit, Hospital de Clínicas; Universidade Federal do Paraná; Curitiba Paraná Brazil