Korsuwan, Pawee, and Budsaba Wiriyasirivaj. 2018. “Lidocaine Spray for Pain Control during Office-based Endometrial Biopsy: A randomized placebo-controlled trial”. Thai Journal of Obstetrics and Gynaecology 26 (4). Bangkok, Thailand:262-69. https://doi.org/10.14456/tjog.2018.31.