Bounyasong S. A Randomized Double-Blind Controlled Trial Comparing Rapid Versus Stepwise Negative Pressure Application for Vacuum Extraction Assisted Vaginal Delivery. Thai J Obstet Gynaecol [internet]. 2017 Apr. 5 [cited 2026 Sep. 28];16(4):206-13. available from: https://he02.tci-thaijo.org/index.php/tjog/article/view/82232