Ko J K Y, Seto M T Y, Cheung V Y T
Department of Obstetrics and Gynecology, University of Hong Kong, 6/F, Professorial Block, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong.
Ultrasound Obstet Gynecol. 2018 Aug;52(2):282-283. doi: 10.1002/uog.18965. Epub 2018 Jul 5.