About the Authors

Catherine Cheng

Affiliation School of Optometry and Vision Science Program, University of California, Berkeley, California, United States of America

Xiaohua Gong

xgong@berkeley.edu

Affiliation School of Optometry and Vision Science Program, University of California, Berkeley, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CC XG. Performed the experiments: CC. Analyzed the data: CC XG. Contributed reagents/materials/analysis tools: CC XG. Wrote the paper: CC XG.