Kamkong, Jongruk, Manasicha Pongsamakthai, Maleechat Sripipatanakul, and Thumwadee Tangsiriwatthana. 2024. “The Effect of Hyoscine Butylbromide for Shortening the Active Phase of the First Stage of Labor: A randomized, double-blind, placebo-controlled trial”. Thai Journal of Obstetrics and Gynaecology 32 (3). Bangkok, Thailand:245-53. https://doi.org/10.14456/tjog.2024.27.