[1] Haematology,Department of Paediatric Oncology
[2] and Haemostaseology,Department of Paediatric Oncology/Haematology
[3] Children's Hospital of the JW Goethe University,Department of Haematology/Oncology
[4] Charité Hospital,Department of Pediatric Haematology
[5] Humboldt University Berlin,undefined
[6] Children's University Hospital,undefined
[7] University of Tuebingen,undefined
[8] Oncology and Endocrinology,undefined
[9] University of Essen,undefined
[10] Essen,undefined
[11] Germany. E-mail: hermann.kreyenberg@kgu.de,undefined