1. Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong 518000, P.R. China
2. Department of Ultrasound, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, P.R. China
3. Department of Traditional Chinese Medicine, Shenzhen Children's Hospital, Shenzhen, Guangdong 518000, P.R. China