1. Department of Global Public Health, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
2. Department of Psychiatry, Prasrimahabhodi Psychiatric Hospital, Ubon Ratchathani, Thailand
3. Department of Psychiatry, King Narai Hospital, Lop Buri, Thailand
4. Department of Psychiatry, Sunpasitthiprasong Hospital, Ubon Ratchathani, Thailand
5. Department of Psychiatry, HRH Princess Maha Chakri Sirindhorn Medical Center (MSMC), Nakhon Nayok, Thailand
6. Department of Psychiatry, Princess Mother National Institute on Drug Abuse Treatment (PMNIDAT), Pathum Thani, Thailand
7. Department of Psychiatry, Sisaket Hospital, Sisaket, Thailand