1. Paediatric Haematology and Oncology; Department of Paediatrics and Adolescent Medicine; University of Freiburg; Freiburg; Germany
2. Department of Pathology; Boeblingen Hospital; Boeblingen; Germany
3. Department of Pathology; University Medical Centre Erlangen; Erlangen; Germany
4. Department of Human Medical Genetics; University of Wuerzburg; Wuerzburg; Germany
5. Department of Paediatrics; Charité Medical School Berlin; Berlin; Germany