About the Authors

Pei Gan

Affiliation Qinggang Senior Care Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, P. R. China

Yan Xie

zhourushui123@163.com (YX); duan.w@outlook.com (WD)

Affiliation Qinggang Senior Care Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, P. R. China

Wenjie Duan

zhourushui123@163.com (YX); duan.w@outlook.com (WD)

Affiliation Department of Applied Social Sciences, City University of Hong Kong, Hong Kong SAR, P. R. China

Qing Deng

Affiliation Qinggang Senior Care Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, P. R. China

Xiuli Yu

Affiliation Qinggang Senior Care Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PG YX WD QD XY. Performed the experiments: PG YX QD XY. Analyzed the data: WD PG. Contributed reagents/materials/analysis tools: WD. Wrote the paper: WD.