1. Cancer Survival Group; Department of Non-Communicable Disease Epidemiology; London School of Hygiene and Tropical Medicine; London UK
2. Division of Pediatric Oncology; Department of Pediatrics; Cantonal Hospital of Aarau; Aarau Switzerland
3. Cancer Control Centre; Osaka International Cancer Institute; Osaka Japan
4. Division of Pediatric Hematology-Oncology-Blood and Marrow Transplantation; University Hospital Carl Gustav Carus; Dresden Germany