About the Authors
- Leena Kovanen
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Affiliations Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland, Department of Alcohol, Drugs and Addiction, National Institute for Health and Welfare, Helsinki, Finland
- Sirkku T. Saarikoski
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Affiliation Department of Alcohol, Drugs and Addiction, National Institute for Health and Welfare, Helsinki, Finland
- Arpo Aromaa
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Affiliation Division of Welfare and Health Policies, National Institute for Health and Welfare, Helsinki, Finland
- Jouko Lönnqvist
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Affiliations Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland, Department of Psychiatry, University of Helsinki, Helsinki, Finland
- Timo Partonen
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* E-mail: timo.partonen@thl.fi
Affiliation Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, Helsinki, Finland
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: STS AA JL TP. Performed the experiments: LK. Analyzed the data: LK. Contributed reagents/materials/analysis tools: STS AA JL TP. Wrote the paper: LK STS AA JL TP.