About the Authors

Martin Craig

Affiliation Nottingham Substance Misuse Service, Nottingham, United Kingdom

Antonio Pennacchia

Affiliation Mental Health, Learning Disabilities and Marginalised Groups, National Health Service (NHS) Nottingham City, Nottingham, United Kingdom

Neil R. Wright

Affiliation Nottingham Substance Misuse Service, Nottingham, United Kingdom

Henry W. Chase

Affiliation Department of Psychiatry, Western Psychiatric Institute and Clinic, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America

Lee Hogarth

Lee.Hogarth@nottingham.ac.uk

Affiliation School of Psychology, University of Nottingham, Nottingham, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MC AP HC LH. Performed the experiments: MC AP NRW. Analyzed the data: HC LH. Contributed reagents/materials/analysis tools: HC LH. Wrote the paper: MC AP HC LH.