The Communities of Pediatric Hematology and Oncology in Wroclaw (PL; Prof. Dr. Alicja Chybicka / Prof. Dr. Krzysztof Kałwak), Dresden (D, Prof. Dr. Meinolf Suttorp) and Prague (CZ, Prof. Dr. Petr Sedláček) are welcoming You to the 11th International Midsummer Meeting on Pediatric Hematology/ Oncology and Stem Cell Transplantation.