1. Department of Anesthesiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China (mainland)
2. Department of Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China (mainland)
3. Department of Neurology, Qingdao West Coast New District People’s Hospital, Qingdao, Shandong, China (mainland)
4. Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China (mainland)