About the Authors

Michael R. Davies

Contributed equally to this work with: Michael R. Davies, Xuhui Liu

Affiliation Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, California, United States of America

Xuhui Liu

Contributed equally to this work with: Michael R. Davies, Xuhui Liu

Affiliations Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California, United States of America, Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, California, United States of America

Lawrence Lee

Affiliation Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California, United States of America

Dominique Laron

Affiliation Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, California, United States of America

Anne Y. Ning

Affiliation Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, California, United States of America

Hubert T. Kim

Affiliations Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California, United States of America, Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, California, United States of America

Brian T. Feeley

feeleyb@orthosurg.ucsf.edu

Affiliations Department of Veterans Affairs, San Francisco Veterans Affairs Medical Center, San Francisco, California, United States of America, Department of Orthopaedic Surgery, 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

Conceived and designed the experiments: MD XL HK BF. Performed the experiments: MD XL LL AN DL. Analyzed the data: MD XL LL AN DL BF. Contributed reagents/materials/analysis tools: XL HK BF. Wrote the paper: MD XL BF.