1. Department of Pediatrics, Shaanxi Provincial People's Hospital, The Affiliated Hospital of Xi'an Medical University, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710068, Shaanxi, China.
2. Central Laboratory, Shaanxi Provincial People's Hospital, The Affiliated Hospital of Xi'an Medical University, The Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710068, Shaanxi, China.
3. Department of Neurology, Xijing Hospital, Air Force Medical University, Xi'an 710032, Shaanxi, China.