1. Department of Pediatrics, Infection & Digestion, Xingtai People's Hospital, Xingtai, Hebei, 054031, China
2. Department of Pediatric Rehabilitation, Xingtai People's Hospital, Xingtai, Hebei, 054031, China
3. Department of Gastroenterology, Tian Jin Dongli Hospital, Tianjin, 300300, China