[Zhang, Xue-Hua; Shi, Hui-Qing; Zhang, XH] Fujian Med Univ, Fujian Childrens Hosp, Shanghai Childrens Med Ctr, Dept Ultrasound,Coll Clin Med Obstet & Gynecol & P, 996 Hengyu Rd, Fuzhou 350011, Fujian Province, Peoples R China.
[Chen, Wen-Juan] Univ South China, Hunan Childrens Hosp, Dept Ultrasound, Changsha 410007, Hunan Province, Peoples R China.
[Yin, Qiang] Univ South China, Hunan Childrens Hosp, Dept Pediat Surg, Changsha 410007, Hunan Province, Peoples R China.