About the Authors

Yu-Wei Chen

Affiliation Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America

Kimberly A. Fiscella

Affiliation Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America

Samuel Z. Bacharach

Affiliation Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America

Donna J. Calu

donna.calu@nih.gov

Affiliation Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YWC DJC. Performed the experiments: YWC KAF SZB. Analyzed the data: YWC KAF. Contributed to the writing of the manuscript: YWC KAF DJC.