1. Unit of Bone Marrow Transplantation; Hospital Israelita Albert Einstein; São Paulo Brazil
2. Department of Social Dentistry; Universidade de São Paulo; São Paulo Brazil
3. Department of Restorative Dentistry (LELO-Special Laboratory of Lasers in Dentistry), School of Dentistry; University of São Paulo; São Paulo Brazil
4. General Pathology Department, School of Dentistry; Universidade de São Paulo; São Paulo Brazil
5. Centro de Pesquisa Clínica; Instituto Israelita de Ensino e Pesquisa Albert Einstein; São Paulo Brazil