Srisomboon, J., D. Ployleumsaeng, P. Suprasert, C. Phongnarisorn, and A. Pantusart. “A 14-Year Retrospective Study of Molar Pregnancy in Maharaj Nakorn Chiang Mai Hospital : High Incidence of Persistent Disease”. Thai Journal of Obstetrics and Gynaecology, vol. 11, no. 1, Mar. 1999, pp. 17-22, https://he02.tci-thaijo.org/index.php/tjog/article/view/257183.