Zhang Yao, Zhang Shu-Cheng, Ren Wei-Dong, Wang Wei-Lin, Zhou Xin
Department of Ultrasound, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China.
Pediatr Surg Int. 2012 Nov;28(11):1157-60. doi: 10.1007/s00383-012-3173-8. Epub 2012 Sep 15.