1. Department of Pediatric Hematology and Oncology; Justus-Liebig-University; Giessen Germany
2. Department of Oral and Maxillofacial Surgery; Justus-Liebig-University; Giessen Germany
3. Department of Dermatology; Justus-Liebig-University; Giessen Germany
4. Department of Pathology; Justus-Liebig-University; Giessen Germany