1 Department of Pediatrics, Guizhou Provincial People's Hospital, Guizhou Medical University, Guiyang, 550002, China.
2 Department of Pediatrics, Guizhou Provincial People's Hospital, Guizhou Medical University, Guiyang, 550002, China; Department of Pediatrics, Baiyun District Hospital, Guiyang, 550014, China. Electronic address: [email protected].
3 Department of Pediatrics, Baiyun District Hospital, Guiyang, 550014, China.