Kerdtawee, P.; Wuttikonsammakit, P.; Chamnan, P. Efficacy of Intravenous Sedation, Paracervical Block and Paracervical Block with Lidocaine Spray on Pain Relief during Uterine Curettage in First Trimester Incomplete Abortion: Randomized clinical trial. Thai J Obstet Gynaecol 2019, 27, 139-148.