Choompon, C., S. Sunghlor, and J. Khonglormyati. “Development of Warfarin Safety Monitoring Network in Phra Nakhon Si Ayutthaya Province”. Journal of Health Science of Thailand, vol. 23, no. 3, Nov. 2017, pp. 445-52, https://thaidj.org/index.php/JHS/article/view/704.