1. Department of Gastrointestinal Surgery, Yongchuan Hospital, Chongqing Medical University, Chongqing 402160, China
2. College of Acupuncture-Moxibustion and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
3. Department of Pediatrics, Jinniu Maternity and Child Health Hospital of Chengdu, Chengdu 610081, China