1. Second Clinical Medical College, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, China
2. Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xi’an 710032, China
3. Department of Thoracic Surgery, The First Affiliated Hospital of Xian Jiaotong University, Xi’an 710061, China
4. School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi 710061, China
5. Department of Anesthesiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
6. Department of Gastroenterology, The First Affiliated Hospital of Xi’an Medical University, Xi’an, Shaanxi 710077, China