About the Authors

Paul M Macey

Affiliation Department of Neurobiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Mary A Woo

Affiliation School of Nursing, University of California Los Angeles, Los Angeles, California, United States of America

Ronald M Harper

To whom correspondence should be addressed. E-mail: rharper@ucla.edu

Affiliation Department of Neurobiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

RMH and MAW designed the study, enrolled participants, performed the experiments, and collected data. PMM designed and performed the analysis. PMM, MAW, and RMH contributed to writing the paper.