1. Department of Obstetrics and Gynecology, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand.
2. Epidemiology Unit, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand.
3. Division of Nursing Service, Songklanagarind Hospital, Songkhla, Thailand.
4. Songkhla Rajanagarindra Psychiatric Hospital, Department of Mental Health, Ministry of Public Health, Songkhla, Thailand.