1. Shandong University Medical College, Ji’nan, Shandong, China (mainland)
2. Department of Anesthesiology, West Branch of The First Affiliated Hospital of University of Science and Technology of China, Ji’nan, Shandong, China (mainland)
3. Department of Anesthesiology, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China (mainland)