About the Authors

Honghe Li

Affiliation Research Center of Medical Education, China Medical University, Shenyang, Liaoning, China

Ning Ding

Contributed equally to this work with: Ning Ding, Yuanyuan Zhang

Affiliation Research Center of Medical Education, China Medical University, Shenyang, Liaoning, China

Yuanyuan Zhang

Contributed equally to this work with: Ning Ding, Yuanyuan Zhang

Affiliation School of Public Health, Dalian Medical University, Dalian, Liaoning, China

Yang Liu

Affiliation School of Public Health, China Medical University, Shenyang, Liaoning, China

Deliang Wen

dlwen@cmu.edu.cn

Affiliation Research Center of Medical Education, China Medical University, Shenyang, Liaoning, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: DW HL. Data curation: HL YZ ND. Formal analysis: HL YZ. Funding acquisition: DW. Investigation: HL. Methodology: HL YL. Project administration: DW HL. Resources: DW. Supervision: DW. Writing – original draft: HL YZ ND YL. Writing – review & editing: HL DW.