[1] Dept. of Pediatric Hematology and Oncology,
[2] Children's Hospital,undefined
[3] Medical School of Hannover,undefined
[4] Carl-Neuberg-Str. 1,undefined
[5] D-30625 Hannover,undefined
[6] Germany. lorenz.grigull@gmx.de,undefined
[7] Dept. of Transfusion Medicine,undefined
[8] Medical School Hannover,undefined
[9] Hannover,undefined
[10] Germany,undefined