1. Division of Health Psychology, Department of Nursing Science, Trier University, Trier, Germany
2. Department for Thoracic and Cardiovascular Surgery, Ruhr‐University Bochum, Bad Oeynhausen, Germany
3. University Heart Center at the University Medical Center Hamburg‐Eppendorf, Hamburg‐Eppendorf, Germany
4. School of Education, Bergische Universitaet Wuppertal, Germany
5. Eurotransplant International Foundation, Leiden, The Netherlands
6. Department of Biology, San Francisco State University, San Francisco, CA