About the Authors

Zhenhai Gan

Affiliation Key Laboratory of Biomedical Information Engineering of Education Ministry, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, P. R. China

Ting Zhang

Affiliation Scientific Research Center, The Second Affiliated Hospital, School of Medicine, Xi’an Jiaotong University, Xi’an, P. R. China

Yongchun Liu

Affiliation Key Laboratory of Biomedical Information Engineering of Education Ministry, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, P. R. China

Daocheng Wu

wudaocheng@mail.xjtu.edu.cn

Affiliation Key Laboratory of Biomedical Information Engineering of Education Ministry, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZG TZ DW. Performed the experiments: ZG TZ YL. Analyzed the data: ZG TZ DW. Wrote the paper: ZG TZ DW.