KUNG F. Risk Factors for Levonorgestrel-releasing Intrauterine System (LNG-IUS) Expulsion among Chinese Women Treated for Menstrual Disorders: Retrospective Cohort Study in a Regional Hospital. Hong Kong J Gynaecol Obstet Midwifery [Internet]. 2023 Mar. 31 [cited 2024 May 2];11(1). Available from: https://hkjgom.org/home/article/view/112