# Erratum to: Evaluating the efficacy of a web-based self-help intervention with and without chat counseling in reducing the cocaine use of problematic cocaine users: the study protocol of a pragmatic three-arm randomized controlled trial

**Authors:** Michael P. Schaub, Larissa J. Maier, Andreas Wenger, Lars Stark, Oliver Berg, Thilo Beck, Boris B. Quednow, Severin Haug

PMC · DOI: 10.1186/s12888-015-0600-0 · BMC Psychiatry · 2015-09-16

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## References

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Source: https://tomesphere.com/paper/PMC4574188