1. Dr. von Hauner Children's Hospital; Ludwig Maximilian University; Munich Germany
2. Dermatology Hospital; Ludwig Maximilian University; Munich Germany
3. University Children's Hospital; University Ulm; Ulm Germany
4. Institute for Transfusion Medicine; University of Ulm and Institute for Clinical Transfusion Medicine and Immunogenetics Ulm; German Red Cross Blood Service; Ulm Germany
5. HELIOS Children's Hospital; Krefeld Germany
6. University Children's Hospital; Charité; Berlin Germany
7. Oral and Maxillofacial Surgery; Ludwig Maximilian University; Munich Germany
8. Department of Pediatrics; Hospital Dornbirn; Dornbirn Austria
9. Department of Transfusion Medicine; Cell Therapeutics and Haemostaseology; Ludwig Maximilian University; Munich Germany