1. Department of Pediatric Hematology/Oncology, CLIP Charles University, University Hospital Motol Prague Czech Republic
2. Amgen Research (Munich) GmbH Munich Germany
3. Global Clinical Development, Amgen Thousand Oaks California USA
4. Department of Pediatric Hematology‐Oncology, IRCCS Ospedale Pediatrico Bambino Gesù Sapienza University of Rome Rome Italy