1 St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria; Labdia Labordiagnostik, Vienna.
2 St. Anna Children's Cancer Research Institute (CCRI), Vienna.
3 Institute of Pharmaceutical Biology/Diagnostic Center of Acute Leukemia (DCAL), Goethe University, Frankfurt/Main.
4 St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria; Labdia Labordiagnostik, Vienna, Austria; St. Anna Children's Hospital, Department of Pediatrics, Medical University of Vienna, Vienna. dworzak@stanna.at.