1. Department of Pediatrics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China
2. Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Nanning, Guangxi, China
3. Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
4. Department of Radiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, P.R. China.