About the Authors

Yan-Ling Zhang

Contributed equally to this work with: Yan-Ling Zhang, Peng Ou

Affiliation Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China

Peng Ou

Contributed equally to this work with: Yan-Ling Zhang, Peng Ou

Affiliation Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China

Xiang-Hang Lu

Affiliation Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China

Yan-Ping Chen

Affiliation Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China

Jun-Mei Xu

Affiliation Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China

Ru-Ping Dai

xyeyyrupingdai@gmail.com

Affiliation Department of Anesthesiology, The Second Xiangya Hospital of Central South University, Changsha, Hunan Province, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RPD. Performed the experiments: YLZ PO XHL YPC JMX. Analyzed the data: PO RPD. Contributed reagents/materials/analysis tools: PO RPD. Wrote the paper: YLZ PO RPD. Designed and supervised the trial: RPD. Wrote the final version of manuscript: RPD. Wrote the first draft of the manuscript: YLZ PO. Used the Graphpad and SPSS 13 to analyze the data: PO RPD. Measured the VAS and VOF perioperatively and collected the data: YLZ PO. Did the anesthesia blind to the study group assignment: XHL YPC JMX.