1. Epidemiology Unit, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand
2. Mae Sot General Hospital, Mae Sot, Thailand
3. Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
4. Bureau of Tuberculosis, Ministry of Public Health, Nonthaburi, Thailand