About the Authors

Min Zhu

Affiliation Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China

Haiyun Wang

wanghy819@hotmail.com

Affiliation Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China

Ai Zhu

Affiliation Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China

Kaijun Niu

Affiliation Department of Epidemiology, School of Public Health, Tianjin Medical University, Tianjin 300052, China

Guolin Wang

Affiliation Department of Anesthesiology, Tianjin Research Institute of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HW GW. Performed the experiments: MZ AZ. Analyzed the data: MZ KN. Wrote the paper: MZ HW.