Upakdee, N., P. Kaeokhiew, and P. Simawong. “Comparison of Drug Prices for Chronic Disease and High Utilization Value Drugs Between Public and Private Hospitals”. Journal of Health Science of Thailand, vol. 26, no. S.1, Nov. 2017, pp. S106-S118, https://thaidj.org/index.php/JHS/article/view/178.