1 Department of Psychiatry, Psychotherapy and Psychotraumatology, Bundeswehr Hospital, Berlin, Germany.
2 Department of Cardiology and Vascular Medicine, West German Heart and Vascular Center Essen, University Duisburg-Essen, Hufelandstrasse 55, 45147 Essen, Germany.
3 Department of Infectious Diseases, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.