Mapaisankit, Nartlada, Pitch Chandeying, and Sasikan Tangthasana. 2021. “Efficacy of Ethyl Chloride Spray versus Subcutaneous 1% Lidocaine Injection for Relieving the Pain of One-rod Contraceptive Implant Removal: A single-blinded randomized controlled trial”. Thai Journal of Obstetrics and Gynaecology 29 (2). Bangkok, Thailand:82-91. https://doi.org/10.14456/tjog.2021.11.