1. Institute of General Practice and Family Medicine, LMU University Hospital, LMU Munich, 80336 Munich, Germany
2. Institute of General Practice, Friedrich-Alexander-University of Erlangen-Nuremberg, 91054 Erlangen, Germany
3. Department of General Practice, University Hospital Würzburg, 97080 Würzburg, Germany
4. Katholische Stiftungshochschule München, University of Applied Sciences, Campus Munich, Faculty of Health and Nursing, 81677 Munich, Germany
5. Division of Infectious Diseases and Tropical Medicine, Medical Center of the University of LMU Munich, 80802 Munich, Germany
6. Institute of Laboratory Medicine, LMU University Hospital, LMU Munich, 81377 Munich, Germany