Department;
of;
Pediatrics;
West;
China;
Second;
University;
Hospital;
Sichuan;
University;
Chengdu;
610041;
Sichuan;
Province;
China;
Department;
of;
Pediatrics;
Pediatric;
Research;
Institute;
of;
Beijing;
Military;
Region;
Beijing;
100700;
China;