About the Authors

Jonathan Graf

Affiliations Department of Medicine, University of California San Francisco, San Francisco, California, United States of America, Division of Rheumatology, San Francisco General Hospital, San Francisco, California, United States of America

Rebecca Scherzer

Affiliations Department of Medicine, University of California San Francisco, San Francisco, California, United States of America, Division of Endocrinology and Metabolism, San Francisco VA Medical Center, San Francisco, California, United States of America

Carl Grunfeld

Affiliations Department of Medicine, University of California San Francisco, San Francisco, California, United States of America, Division of Endocrinology and Metabolism, San Francisco VA Medical Center, San Francisco, California, United States of America

John Imboden

jimboden@medsfgh.ucsf.edu

Affiliations Department of Medicine, University of California San Francisco, San Francisco, California, United States of America, Division of Rheumatology, San Francisco General Hospital, 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: JG CG JI. Performed the experiments: JG CG JI. Analyzed the data: JG RS CG JI. Contributed reagents/materials/analysis tools: JG RS CG JI. Wrote the paper: JG RS CG JI.