1. Department of Psychosomatics and Psychotherapy, University of Cologne, Germany
2. Department of Psychosomatic Medicine and Psychotherapy, University of Göttingen Medical Centre, Germany
3. German Centre for Cardiovascular Research, partner site Göttingen, Germany
4. Institute of Medical Biometry and Informatics, University of Heidelberg, Germany
5. Library of the Medical Faculty, University of Mannheim, Germany
6. Curschmann Klinik, Timmendorfer Strand, Germany
7. IHF-Institut für Herzinfarktforschung, Ludwigshafen am Rhein, Germany