About the Authors

John F. Kelly

jkelly11@mgh.harvard.edu

Affiliation Center for Addiction Medicine Departments of Psychiatry Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Robert L. Stout

Affiliation Pacific Institute for Research and Evaluation, Providence, Rhode Island, United States of America

M. Claire Greene

Affiliation Center for Addiction Medicine Departments of Psychiatry Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Valerie Slaymaker

Affiliation Hazelden Foundation, Center City, Minnesota, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JFK VS. Performed the experiments: JFK VS MCG RLS. Analyzed the data: RLS MCG. Contributed reagents/materials/analysis tools: JFK RLS MCG VS. Wrote the paper: JFK RSL MCG VS.