1. Zentrum für Klinische Epidemiologie Institut für Medizinische Informatik, Biometrie und Epidemiologie Universitätsklinikum Essen Essen Germany
2. Department of Epidemiology School of Public Health Boston University Boston MA USA
3. Division of Cancer Epidemiology and Genetics National Cancer Institute National Institutes of Health Rockville MD USA
4. Department of Pathology Josephine Nefkens Institute Erasmus MC Rotterdam The Netherlands
5. Cancer Registry of North Rhine‐Westphalia Muenster Germany