Ma B, Wu L, Zhang W
Department of Ultrasound, Gansu Provincial Maternity and Child-care Hospital, Gansu Province, China.
Department of Cardiology, Cardiovascular Center, Children's Hospital of Fudan University, Shanghai, China.
Ultrasound Obstet Gynecol. 2020 Jan;55(1):135-137. doi: 10.1002/uog.20365.