About the Authors

QianKun Quan

Affiliation The Key Laboratory of Biomedical Information Engineering of Ministry of Education, and Institute of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, National Engineering Research Center of Health Care and Medical Devices, Xi'an Jiaotong University Branch, Xi'an, China

Jue Wang

juewang@mail.xjtu.edu.cn

Affiliation The Key Laboratory of Biomedical Information Engineering of Ministry of Education, and Institute of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, National Engineering Research Center of Health Care and Medical Devices, Xi'an Jiaotong University Branch, Xi'an, China

Xi Li

Affiliation Department of Geriatrics, The Second Affiliated Hospital, Xi'an Jiaotong University College of Medicine, Xi'an, China

Yi Wang

Affiliation The Key Laboratory of Biomedical Information Engineering of Ministry of Education, and Institute of Biomedical Engineering, School of Life Science and Technology, Xi'an Jiaotong University, National Engineering Research Center of Health Care and Medical Devices, Xi'an Jiaotong University Branch, Xi'an, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: QQ JW XL. Performed the experiments: QQ YW. Analyzed the data: QQ. Contributed reagents/materials/analysis tools: JW XL. Wrote the paper: QQ JW.