YIP, Chui-Shan, Kar-Hung SIONG, and Hon-Cheung LEE. 2023. “Expulsion of a Levonorgestrel-Releasing Intrauterine System: A Retrospective Analysis”. Hong Kong Journal of Gynaecology, Obstetrics and Midwifery 18 (2). https://doi.org/10.12809/hkjgom.18.2.250.