About the Authors

Jun Xu

Contributed equally to this work with: Jun Xu, Chen Li

Affiliation Emergency Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China

Chen Li

Contributed equally to this work with: Jun Xu, Chen Li

Affiliation Emergency Department, Tianjin Medical University General Hospital, Tianjin, China

Yan Li

Affiliation Emergency Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China

Joseph Walline

Affiliation Division of Emergency Medicine, Department of Surgery, Saint Louis University Hospital, Saint Louis, Missouri, United States of America

Liangliang Zheng

Affiliation Emergency Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China

Yangyang Fu

Affiliation Emergency Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China

Dongqi Yao

Affiliation Emergency Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China

Huadong Zhu

Affiliation Emergency Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China

Xiaohe Liu

Affiliation Emergency Department, Tianjin Medical University General Hospital, Tianjin, China

Yanfen Chai

Affiliation Emergency Department, Tianjin Medical University General Hospital, Tianjin, China

Zhong Wang

Affiliation Emergency Department, Beijing Tsinghua Changgung Hospital, Beijing, China

Xuezhong Yu

yxzpumch@126.com

Affiliation Emergency Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China

Competing Interests

The study received funding from the Capital Health Research and Development Fund (2011-4001-04) and the National Health and Family Planning Commission of the People's Republic of China Special Research Fund (201502019). There are no patents, products in development, or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: JX CL. Performed the experiments: CL LZ YF DY. Analyzed the data: CL XL. Wrote the paper: JX CL YL JW. Final approval: XY ZW HZ YC.