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