1. Addictive Substance Project Tokyo Metropolitan Institute of Medical Science Tokyo Japan
2. Department of Drug Dependence Research National Institute of Mental Health National Centre of Neurology and Psychiatry Tokyo Japan
3. Department of Mental Health and Psychiatric Nursing Tokyo Medical and Dental University Tokyo Japan
4. Department of Clinical Data Science Clinical Research & Education Promotion Division National Centre of Neurology and Psychiatry Tokyo Japan
5. Social Psychiatry and Mental Health Faculty of Medicine University of Tsukuba Ibaraki Japan
6. Department of Psychiatry National Centre Hospital National Centre of Neurology and Psychiatry Tokyo Japan
7. Department of Psychiatry Chiba Hospital Chiba Japan
8. Department of Biostatistics Faculty of Medicine University of Tsukuba Ibaraki Japan
9. Department of Child Psychiatry Chiba‐University Hospital Chiba Japan
10. Department of Clinical Research Promotion Translational Medical Centre National Centre of Neurology and Psychiatry Tokyo Japan