About the Authors

Yanhua Li

Contributed equally to this work with: Yanhua Li, Xinhong Guo, Qiao Xue

Affiliation Institute of Geriatric Cardiology, the General Hospital of Chinese People’s Liberation Army (PLA), Beijing, China

Xinhong Guo

Contributed equally to this work with: Yanhua Li, Xinhong Guo, Qiao Xue

Affiliation Institute of Geriatric Cardiology, the General Hospital of Chinese People’s Liberation Army (PLA), Beijing, China

Qiao Xue

Contributed equally to this work with: Yanhua Li, Xinhong Guo, Qiao Xue

Affiliation Institute of Geriatric Cardiology, the General Hospital of Chinese People’s Liberation Army (PLA), Beijing, China

Mei Zhu

Affiliation Institute of Geriatric Cardiology, the General Hospital of Chinese People’s Liberation Army (PLA), Beijing, China

Lei Gao

Affiliation Institute of Geriatric Cardiology, the General Hospital of Chinese People’s Liberation Army (PLA), Beijing, China

Yu Wang

Wangyu301hospital@yahoo.cn

Affiliation Institute of Geriatric Cardiology, the General Hospital of Chinese People’s Liberation Army (PLA), Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YL XG QX MZ LG YW. Performed the experiments: YL XG QX MZ LG. Analyzed the data: YL XG YW. Contributed reagents/materials/analysis tools: YL XG. Wrote the paper: YL YW.