This article was submitted to Psychological Medicine with incorrect author affiliation. ‘LVR-Klinikum Essen, Klinik fur Psychiatrie und Psychotherapie, University of Duisburg-Essen, Duisburg, Germany’ should read ‘LVR-Klinikum Essen, Klinik für Psychiatrie und Psychotherapie, University of Duisburg-Essen, Essen, Germany’.
This has been updated per the above.