1. Department of Psychiatry; Betsi Cadwaladr University Health Board; North Wales UK
2. Centre for Mental Health and Society; Bangor University; Wrexham Wales UK
3. Department of Psychiatry and Psychotherapy III; University of Ulm; Ulm Germany
4. Department of Biostatistics; University of Liverpool; Liverpool UK
5. Health & Community Care Research Unit (HaCCRU); Institute of Psychology, Health and Society; University of Liverpool; Liverpool UK
6. Department of Psychiatry and Psychotherapy; Technische Universität München; Munich Germany
7. Department of Psychiatry; University of Oxford; Oxford UK
8. Institute of Psychiatry; Kings College London; London UK
9. School of Social Sciences; Bangor University; Wales UK