About the Authors

Songchao Xu

Affiliation Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

Huili Li

Affiliation Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

Zhangran Ai

Affiliation Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

Ruijuan Guo

Affiliation Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

Hao Cheng

Affiliation Department of Anesthesiology, Beijing Ditan Hospital, Capital Medical University, Beijing, China

Yun Wang

wangyun129@ccmu.edu.cn

Affiliation Department of Anesthesiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.