About the Authors

Wei Xu

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Jijun Xu

Affiliation College of Economics and Management, Nanjing Agricultural University, Nanjing, China

Shifeng Liu

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Bo Chen

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Xueli Wang

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Yan Li

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Yun Qian

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Weihong Zhao

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Jianqing Wu

jwuny@njmu.edu.cn

Affiliation Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JW WX WZ JX. Performed the experiments: WX JX SL BC. Analyzed the data: WX JX SL XW YL YQ. Contributed reagents/materials/analysis tools: WX JX SL XW YL YQ. Wrote the paper: WX JX SL BC.