Officers of the Societies sponsoring "Pediatric Blood and Cancer" (PBC): SIOP, ASPH/O, Histiocyte Society and the International Surgical Pediatric Oncology Society (IPSO), are represented on the Editorial Board ex officio. Other members are selected according to their recognized expertise as well as being representative of all six continents. The Editorial Board is renewed periodically. The Editor-in-Chief is selected by the Board of SIOP in concert with ASPH/O, the Histiocyte Society and IPSO, which have also recognised PBC as their official journal.