1 Department of Mental Health, Evangelisches Krankenhaus Castrop-Rauxel, Academic Teaching Hospital of The University of Duisburg, Essen, Castrop-Rauxel, Germany.
2 Department of Psychiatry and Psychotherapy, Faculty of Medicine, Landschaftsverband Rheinland-Hospital Essen, University of Duisburg-Essen, Essen, Germany.
3 Department of Psychiatry and Psychotherapy, University Hospital Cologne, Kerpener Str. 62, 50924, Cologne, Germany. jens.kuhn@uk-koeln.de.