1. Comprehensive Cancer Center University Hospital Freiburg Freiburg Germany
2. Clinic for General internal Medicine and Psychosomatics University Clinic Heidelberg Heidelberg Germany
3. Institute of General Practice Johann‐Wolfgang‐Goethe University Frankfurt am Main Frankfurt Germany
4. Research Methodology and Project Management in General Practice, Institute for General Practice Johann Wolfgang Goethe University in Frankfurt am Main Frankfurt Germany
5. Johann Wolfgang Goethe‐Universität Frankfurt am Main/Johann Wolfgang Goethe University Frankfurt Germany
6. Institute of Social Medicine and Epidemiology Brandenburg Germany
7. Brandenburg Medical School Theodor Fontane Brandenburg Germany
8. Department of Internal Medicine, Division of Pulmonology Paracelsus Medical University, Clinic Center Nuremberg Nuremberg Germany