Corresponding author
Prof. Dr. med. Stefan Bielack, Pediatrics 5 (Oncology, Hematology, Immunology), Center for Pediatric, Adolescent and Women’s Medicine, Stuttgart Cancer Center, Klinikum Stuttgart – Olgahospital, Kriegsbergstr. 62, 70174 Stuttgart, Germany Tel.: ++49(0)711 2787 3881; Email: s.bielack@klinikum-stuttgart.de