1 Department of Pediatrics, Affiliated Hospital of Inner Mongolia Medical University, Hohhot North Street, Inner Mongolia, 010050, China.
2 Hohhot People's Mediation Committee for Medical Disputes, Hohhot Xinhua Street, Inner Mongolia, 010050, China.
3 Department of Orthopedics, Affiliated Hospital of Inner Mongolia Medical University, Hohhot North Street, Inner Mongolia, 010050, China.
4 Department of Pediatrics, Affiliated Hospital of Inner Mongolia Medical University, Hohhot North Street, Inner Mongolia, 010050, China. Electronic address: sdm052@126.com.