Sripha, Maneenuch, Chuenkamon Charakorn, Navamol Lekskul, and Arb-aroon Lertkhachonsuk. 2018. “Analgesic Effect of Lidocaine Spray during Endometrial Biopsy: A randomized controlled trial”. Thai Journal of Obstetrics and Gynaecology 26 (3). Bangkok, Thailand:190-97. https://doi.org/10.14456/tjog.2018.18.