Nuangpho, Wanlayanee, Sukanya Srinil, Thumwadee Tangsiriwatthana, and Maleechat Sripipattanakul. 2018. “Gel Pack Reduced Postoperative Pain in Benign Gynecologic Surgery: A randomized controlled trial”. Thai Journal of Obstetrics and Gynaecology 26 (1). Bangkok, Thailand:52-58. https://doi.org/10.14456/tjog.2018.4.