About the Authors

Scott A. Houck

Affiliation Medicine Administration, University of North Carolina, Chapel Hill, North Carolina, United States of America

John I. Clark

clarkji@u.washington.edu

Affiliations Department of Biological Structure, University of Washington, Seattle, Washington, United States of America, Department of Ophthalmology, University of Washington, Seattle, Washington, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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