Institution: | 1. Department of Ultrasound, Anhui Provincial Maternity and Child Health Hospital, Affiliated Hospital of Anhui Medical University, Hefei, China;2. Center of Imaging Diagnosis, Anhui Provincial Children's Hospital, Hefei, China;3. Department of Ultrasound, Fujian Provincial Maternity and Children's Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China |