Thaewnongiew, Kesorn, Piboon Sithithaworn, Sasithron Tangsawad, Seri Singtong, Nitaya Chudthaisong, and Waraluk Tangkanakul. 2017. “Incidence and Re-Infection Rates of Opisthorchis Viverrini in Upper Northeastern Communities of Thailand”. Journal of Health Science of Thailand 25 (3):370-79. https://www.thaidj.org/index.php/JHS/article/view/266.