1. Department of Psychiatry, Epidemiology of Psychiatric Disorders and Mental Health Research Unit, Faculty of Medicine, Chulalongkorn University, and Department of Psychiatry, King Chulalongkorn Memorial Hospital, Bangkok, Thailand
2. Department of Psychiatry, Faculty of Medicine, Prince of Songkla University, Songkla, Thailand
3. School of Medicine, Mae Fah Luang University, Chiang Rai, Thailand