1. Center for Anesthesiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China (mainland)
2. Department of Anesthesiology, Emergency General Hospital, Beijing, China (mainland)
3. Department of Anesthesiology, Emergency General Hospital, Beijing, China (mainland)
4. Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei, China (mainland)
5. Department of Thoracic Surgery, Cangzhou Central Hospital, Cangzhou, Hebei, China (mainland)