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