1 University of Giessen, Department of Psychosomatics and Psychotherapy, Giessen, Germany; University of Rostock, Department of Psychosomatics and Psychotherapy, Rostock, Germany. Electronic address: Falk.Leichsenring@psycho.med.uni-giessen.de.
2 International Psychoanalytic University, Berlin, Germany.
3 Albert Einstein College of Medicine, Department of Psychiatry and Behavioral Sciences, Bronx, NY, USA.
4 Department of Psychology, Stockholm University, Stockholm, Sweden.
5 University of Leuven, Faculty of Psychology and Educational Sciences, Belgium; Educational and Health Psychology, University College London, UK.