[1]
K.-Y. LUI, Y.-T. LEE, C.-H. SO, and E. L. YU, “Difference in Serum Human Chorionic Gonadotrophin Levels Measured Using the World Health Organization 3rd versus 5th International Standard: A Correlation Study with Reference to Management of Pregnancy of Unknown Location”, Hong Kong J Gynaecol Obstet Midwifery, vol. 17, no. 1, Jan. 2017.