1. Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Centre, Johannes Gutenberg‐University Mainz Mainz Germany
2. University Cancer Centre Mainz (UCT) Mainz Germany
3. Comprehensive Cancer Centre Tübingen‐Stuttgart Tübingen Germany
4. Department of Internal Medicine III University Medical Centre Johannes Gutenberg‐University Mainz Mainz Germany