1. Centre for Dermato‐Oncology Department of Dermatology Eberhard‐Karls University Tuebingen Germany
2. Portuguese Air Force Health Care Direction Lisbon Portugal
3. Institute of Social Medicine and Epidemiology University Hospital Schleswig‐Holstein Luebeck Germany
4. Saarland Cancer Registry Saarbruecken Germany
5. Institute for Clinical Epidemiology und Applied Biostatistics Eberhard‐Karls University Tuebingen Germany