About the Authors

Jidong Huang

jhuang12@uic.edu

Affiliation Institute for Health Research and Policy, University of Illinois at Chicago, Chicago, Illinois, United States of America

Rong Zheng

Affiliation School of International Trade and Economics, University of International Business and Economics, Beijing, China

Sherry Emery

Affiliation Institute for Health Research and Policy, University of Illinois at Chicago, Chicago, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JH SE. Collected data: JH RZ. Conducted data analysis: JH. Contributed to data interpretation: JH SE RZ. Wrote the first draft of the manuscript: JH. Revised the draft: SE. Reviewed and approved the final version of the manuscript: JH RZ SE.