1. Department of Psychiatry and Psychotherapy, Medical Faculty, Heinrich‐Heine University Düsseldorf, LVR‐Klinikum Düsseldorf, Düsseldorf, Germany
2. WHO Collaborating Centre on Quality Assurance and Empowerment in Mental Health, Düsseldorf, Germany
3. Department of Mental Health and Substance Abuse, World Health Organization, Geneva, Switzerland
4. Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
5. Department of Health Statistics and Information Systems, World Health Organization, Geneva, Switzerland