About the Authors

Barbara Van Straaten

straaten@ivo.nl

Affiliations Erasmus Medical Centre, Rotterdam, the Netherlands, IVO Addiction Research Institute, Rotterdam, the Netherlands

Carola T. M. Schrijvers

Affiliations Erasmus Medical Centre, Rotterdam, the Netherlands, IVO Addiction Research Institute, Rotterdam, the Netherlands

Jorien Van der Laan

Affiliation Radboud University medical center, Department of Primary and Community Care, Netherlands Center for Social Care Research, Nijmegen, the Netherlands

Sandra N. Boersma

Affiliation Radboud University medical center, Department of Primary and Community Care, Netherlands Center for Social Care Research, Nijmegen, the Netherlands

Gerda Rodenburg

Affiliations Erasmus Medical Centre, Rotterdam, the Netherlands, IVO Addiction Research Institute, Rotterdam, the Netherlands

Judith R. L. M. Wolf

Affiliation Radboud University medical center, Department of Primary and Community Care, Netherlands Center for Social Care Research, Nijmegen, the Netherlands

Dike Van de Mheen

Affiliations Erasmus Medical Centre, Rotterdam, the Netherlands, IVO Addiction Research Institute, Rotterdam, the Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BS CS JL SB JW DM. Performed the experiments: BS JL. Analyzed the data: BS. Wrote the paper: BS CS JL SB GR JW DM.