1. Department of Psychiatry, Psychotherapy and Psychosomatic Medicine Evangelisches Krankenhaus Castrop‐Rauxel Castrop‐Rauxel, Germany Academic Teaching Hospital of the University of Duisburg‐Essen Essen Germany
2. Department of Psychiatry and Psychotherapy Faculty of Medicine LVR‐Hospital Essen University of Duisburg‐Essen Essen Germany
3. Northern Anesthesia & Pain Medicine, LLC Eagle River Alaska USA
4. Department of Anesthesiology and Pain Medicine University of Washington School of Medicine Seattle Washington USA