About the Authors

Christopher Sundström

christopher.sundstrom@ki.se

Affiliation Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden

Mikael Gajecki

Affiliation Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden

Magnus Johansson

Affiliations Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden, Department of Public Health, Karolinska Institutet, Stockholm, Sweden, Stockholm Center for Dependency Disorders, Stockholm, Sweden

Matthijs Blankers

Affiliations Arkin Mental Health Care, Amsterdam, The Netherlands, Trimbos, Netherlands Institute of Mental Health and Addiction, Amsterdam, The Netherlands, Department of Psychiatry, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands

Kristina Sinadinovic

Affiliations Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden, Stockholm Center for Dependency Disorders, Stockholm, Sweden

Erik Stenlund-Gens

Affiliation Department of Psychology, Stockholm University, Stockholm, Sweden

Anne H. Berman

Affiliations Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden, Stockholm Center for Dependency Disorders, Stockholm, Sweden

Competing Interests

All the authors declare that no competing interests exist. All authors but one declare no connection with any tobacco, alcohol, pharmaceutical or gaming industry. Berman is a board member of a Research Council funded by Svenska Spel (https://svenskaspel.se/), a company wholly owned by the Swedish state and whose entire profits go to the national treasury. The authors have no connection to AFA Insurance aside from receiving the research grant noted in the Financial Disclosure statement. There are no employment/consultancy, patents, products in development or marketed products to declare. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: AHB KS CS MJ ESG. Performed the experiments: CS MJ KS AHB MG ESG. Analyzed the data: CS MG KS AHB MB. Wrote the paper: CS MG KS AHB. Designed the software used in analysis: MJ.