1. Department of Anesthesiology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China (mainland)
2. Department of Anesthesiology, Taizhou Hospital of Zhejiang Province, Hangzhou, Zhejiang, China (mainland)
3. Department of Anesthesiology, Ningbo Medical Center Lihuili Eastern Hospital, Ningbo, Zhejiang, China (mainland)
4. Department of Digestive Medicine, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China (mainland)