About the Authors

April W. Armstrong

aprilarmstrong@post.harvard.edu

Affiliation Department of Dermatology, University of California Davis, Sacramento, California, United States of America

Steven W. Lin

Affiliation Department of Dermatology, University of California Davis, Sacramento, California, United States of America

Cynthia J. Chambers

Affiliation Department of Dermatology, University of California Davis, Sacramento, California, United States of America

Mary E. Sockolov

Affiliation Department of Dermatology, University of California Davis, Sacramento, California, United States of America

David L. Chin

Affiliation Center for Healthcare Policy and Research, Graduate Group in Epidemiology, University of California Davis, Sacramento, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AA. Performed the experiments: SL CC MS. Analyzed the data: DC. Contributed reagents/materials/analysis tools: AA. Wrote the paper: AA DC.