About the Authors

Giselle M. Knudsen

Affiliation Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, United States of America

Robert J. Chalkley

chalkley@cgl.ucsf.edu

Affiliation Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: GMK RJC. Wrote the paper: GMK RJC.