About the Authors

Wendy M. Bosker

Affiliation Departments of Neuropsychology and Psychopharmacology, Maastricht University, Maastricht, The Netherlands

Erin L. Karschner

Affiliation Chemistry and Drug Metabolism, Intramural Research Program, National Institute on Drug Abuse, National Institute of Health, Baltimore, Maryland, United States of America

Dayong Lee

Affiliation Chemistry and Drug Metabolism, Intramural Research Program, National Institute on Drug Abuse, National Institute of Health, Baltimore, Maryland, United States of America

Robert S. Goodwin

Affiliation Chemistry and Drug Metabolism, Intramural Research Program, National Institute on Drug Abuse, National Institute of Health, Baltimore, Maryland, United States of America

Jussi Hirvonen

Affiliation Molecular Imaging Branch, National Institute of Mental Health, National Institute of Health, Bethesda, Maryland, United States of America

Robert B. Innis

Affiliation Molecular Imaging Branch, National Institute of Mental Health, National Institute of Health, Bethesda, Maryland, United States of America

Eef L. Theunissen

Affiliation Departments of Neuropsychology and Psychopharmacology, Maastricht University, Maastricht, The Netherlands

Kim P. C. Kuypers

Affiliation Departments of Neuropsychology and Psychopharmacology, Maastricht University, Maastricht, The Netherlands

Marilyn A. Huestis

Contributed equally to this work with: Marilyn A. Huestis, Johannes G. Ramaekers

Affiliation Chemistry and Drug Metabolism, Intramural Research Program, National Institute on Drug Abuse, National Institute of Health, Baltimore, Maryland, United States of America

Johannes G. Ramaekers

Contributed equally to this work with: Marilyn A. Huestis, Johannes G. Ramaekers

j.ramaekers@maastrichtuniversity.nl

Affiliation Departments of Neuropsychology and Psychopharmacology, Maastricht University, Maastricht, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ELK DL RSG JH RBI MAH. Performed the experiments: ELK DL. Analyzed the data: WMB ELT KPCK JGR. Wrote the paper: WMB MAH JGR.