1 Department of Pediatrics, Affiliated Hospital of Inner Mongolia Medical University, No. 1, Tongdao North Street, Huimin District, Hohhot, Inner Mongolia, 010050, China.
2 Department of Pediatrics, Affiliated Hospital of Inner Mongolia Medical University, No. 1, Tongdao North Street, Huimin District, Hohhot, Inner Mongolia, 010050, China. Electronic address: 123883403@qq.com.