Unfortunately, the original version of this article [1] contained an error. The caption on Fig. 2 was incorrect. The corrected caption should read:
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Schaub M, Maier L, Wenger A, Stark L, Berg O, Beck T, et al. 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. BMC Psychiatry. 2015;15:156.
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The online version of the original article can be found under doi:10.1186/s12888-015-0518-6.
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Schaub, M.P., Maier, L.J., Wenger, A. et al. 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. BMC Psychiatry 15, 218 (2015). https://doi.org/10.1186/s12888-015-0600-0
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DOI: https://doi.org/10.1186/s12888-015-0600-0