About the Authors

Wayne M. Getz

wgetz@berkeley.edu

Affiliations Dept. ESPM, UC Berkeley, CA 94720-3114, United States of America, School of Mathematical Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa

Richard Salter

Affiliation Computer Science Dept., Oberlin College, Oberlin, Ohio, OH 44074, United States of America

Andrew J. Lyons

Affiliation Vice Provost Office for Undergraduate Education, Stanford University, Stanford, CA 94305, United States of America

Nicolas Sippl-Swezey

Affiliation Francis I. Proctor Foundation for Research in Ophthalmology, UC San Francisco, Box 0412, San Francisco, CA 94143-0412, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WMG. Performed the experiments: WMG. Analyzed the data: WMG. Contributed reagents/materials/analysis tools: RS. Wrote the paper: WMG RS AJL N-SS.