1. Department of General Practice and Primary Care, Center for Psychosocial Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
2. Department of Primary Medical Care, University of Luebeck, Luebeck, Germany
3. University and University Hospital Würzburg, Comprehensive Heart Failure Center Würzburg, Würzburg, Germany
4. University of Göttingen Medical Center, and German Center for Cardiovascular Research (DZHK), partner site Göttingen, Göttingen, Germany