[1] Childrens Univ Hosp, Dept Hematol Oncol, Tubingen, Germany
[2] Childrens Univ Hosp, Dept Pediat Hematol & Oncol, Dusseldorf, Germany
[3] Univ Tubingen, Med Ctr, Tubingen, Germany
[4] Goethe Univ Frankfurt, Frankfurt, Germany
[5] Univ Heidelberg, Childrens Hosp, Dept Pediat Oncol Hematol & Immunol, Heidelberg, Germany
[6] Univ Wurzburg, Med Ctr, Wurzburg, Germany
[7] Univ Munich, Dr Von Haunerschen Kinderspital, D-80337 Munich, Germany
[8] Hannover Med Sch, D-30623 Hannover, Germany
[9] Childrens Univ Hosp, Dept Hematol Oncol, Tubingen, Germany