Yulin He1, Yu Zhang2, Lihong Xing2, Bin Li1, Hongjun Li3, Xiaoping Yin2
1Department of Radiology, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China; 2Affiliated Hospital of Hebei University, Baoding 071000, China; 3Beijing You An Hospital, Capital Medical University, Beijing 100069, China.