1. Center for Benign Hematology, Thrombosis and Hemostasis, Van Creveldkliniek, University Medical Center Utrecht, Utrecht, The Netherlands
2. Department of Oral and Maxillofacial Surgery, University Medical Center Utrecht, Utrecht, The Netherlands
3. Oral Medicine Ambulatory, Hematology and Hemotherapy Center, University of Campinas, Campinas, Sao Paulo, Brazil