YIP, C.-S., SIONG, K.-H. and LEE, H.-C. (2023) “Expulsion of a Levonorgestrel-releasing Intrauterine System: a Retrospective Analysis”, Hong Kong Journal of Gynaecology, Obstetrics and Midwifery, 18(2). doi: 10.12809/hkjgom.18.2.250.