1. Division of Molecular Genetic Epidemiology German Cancer Research Center (DKFZ) Im Neuenheimer Feld 580 D‐69120 Heidelberg Germany
2. Division of Cancer Epidemiology German Cancer Research Center (DKFZ) Im Neuenheimer Feld 580 D‐69120 Heidelberg Germany
3. Faculty of Medicine University of Heidelberg Heidelberg Germany
4. Helsinki University Hospital Comprehensive Cancer Center Helsinki Finland
5. Cancer Gene Therapy Group, Translational Immunology Research Program University of Helsinki Helsinki Finland
6. Hopp Children's Cancer Center (KiTZ) Heidelberg Germany
7. Division of Pediatric Neurooncology German Cancer Research Center (DKFZ) German Cancer Consortium (DKTK) Heidelberg Germany
8. Center for Primary Health Care Research Lund University 205 02 Malmö Sweden
9. Department of Family Medicine and Community Health Department of Population Health Science and Policy Icahn School of Medicine at Mount Sinai New York NY U.S.A.
10. Center for Community‐based Healthcare Research and Education (CoHRE) Department of Functional Pathology School of Medicine Shimane University Japan
11. Faculty of Medicine and Biomedical Center in Pilsen Charles University in Prague 30605 Pilsen Czech Republic