Nartlada Mapaisankit และ Pitch Chandeying; 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. <i>Thai Journal of Obstetrics and Gynaecology</i>, <i>29</i>(2), 82-91.Nartlada Mapaisankit และ Pitch Chandeying; Sasikan Tangthasana. "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 (2021):82-91.Nartlada Mapaisankit และ Pitch Chandeying; Sasikan Tangthasana. 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. PIMDEE Co. Ltd.:ม.ป.ท. 2021.