About the Authors

Kathy Bailey

Affiliation Center for Reproductive Sciences, University of California San Francisco, San Francisco, California, United States of America

Tahmineh Yazdi

Affiliation Center for Reproductive Sciences, University of California San Francisco, San Francisco, California, United States of America

Umesh Masharani

Affiliation Division of Endocrinology, University of California San Francisco, San Francisco, California, United States of America

Blake Tyrrell

Affiliation Division of Endocrinology, University of California San Francisco, San Francisco, California, United States of America

Anthony Butch

Affiliation Department of Pathology and Laboratory Medicine, Geffen School of Medicine at UCLA, Los Angeles, California, United States of America

Fred Schaufele

fred.schaufele@ucsf.edu

Affiliations Center for Reproductive Sciences, University of California San Francisco, San Francisco, California, United States of America, Department of Obstetrics and Gynecology, University of California San Francisco, San Francisco, California, United States of America

Competing Interests

The authors of this manuscript have the following competing interests: FS is listed as an inventor on UCSF’s pending US patent application “Ultrasensitive Androgen Receptor BioAssay” (PCT/US2015/022301) from which the author may benefit. FS owns shares in a company that is developing this technology and that potentially represents a competing interest. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: FS. Performed the experiments: KB TY FS. Analyzed the data: KB FS. Contributed reagents/materials/analysis tools: KB TY UM BT AB FS. Wrote the paper: KB AB FS.