About the Authors

Astri Parawita Ayu

a.ayu@psych.ru.nl

Affiliations Department of Psychiatry, School of Medicine, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia, Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands

Boukje Dijkstra

Affiliation Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands

Milou Golbach

Affiliation Praktikon, Nijmegen, the Netherlands

Cor De Jong

Affiliation Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands

Arnt Schellekens

Affiliations Nijmegen Institute for Scientist-Pracititoners in Addiction, Radboud University, Nijmegen, The Netherlands, Department of Psychiatry, Radboud University Medical Centre, Nijmegen, the Netherlands

Competing Interests

One of the authors is employed by Praktikon. This NGO provided support in the form of salaries for one of the authors MG, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of the authors are articulated in the 'author contributions' section. This does not alter our adherence to PLOS ONE policies, including those on sharing data and materials.

Author Contributions

Conceptualization: APA CDJ AS. Data curation: MG. Formal analysis: APA AS. Funding acquisition: APA CDJ AS. Methodology: APA CDJ AS. Project administration: APA. Supervision: CDJ AS. Validation: APA CDJ AS. Writing – original draft: APA AS. Writing – review & editing: APA BD MG CDJ AS.