Sookpeng, Supawitoo, Chitsanupong Butdee, and Weerawat Sanbunlerng. 2017. “A Survey on Radiation Dose from Computed Tomography Examinations in Phitsanulok Province”. Journal of Health Science of Thailand 26 (1):210-19. https://thaidj.org/index.php/JHS/article/view/155.