About the Authors

Oscar Harari

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Jen-Chyong Wang

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Kathleen Bucholz

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Howard J. Edenberg

Affiliation Department of Biochemistry and Molecular Biology, School of Medicine, Indiana University, Indianapolis, Indiana, United States of America

Andrew Heath

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Nicholas G. Martin

Affiliation Genetic Epidemiology, Queensland Institute of Medical Research, Brisbane, Australia

Michele L. Pergadia

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Grant Montgomery

Affiliation Molecular Epidemology, Queensland Institute of Medical Research, Brisbane, Australia

Andrew Schrage

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Laura J. Bierut

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Pamela F. Madden

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Alison M. Goate

goatea@psychiatry.wustl.edu

Affiliation Department of Psychiatry, Washington University School of Medicine, St. Louis, Missouri, United States of America

Competing Interests

Dr. Bierut, Dr. Goate and Dr. Wang are listed as inventors on the patent “Markers for Addiction” (US 20070258898) covering the use of certain SNPs in determining the diagnosis, prognosis, and treatment of addiction. Dr. Bierut acted as a consultant for Pfizer, Inc. in 2008. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: OH AMG J-CW KB HJE AH NGH GM LJB PFM. Performed the experiments: OH AS. Analyzed the data: OH AS AMG. Wrote the paper: OH AMG. Phenotype Data Collection: KB AH MLP GM AS LJB PFM. Reviewed and contributed in writing the paper: OH J-CW KB HJE AH NGM MLP GM AS PFM AMG.