Correction to: Trials 21, 712 (2020)
http://orcid.org/10.1186/s13063-020-04611-9
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Sprague, et al. Cluster identification, selection, and description in cluster randomized crossover trials: the PREP-IT trials. Trials. 2020;21:712. https://doi.org/10.1186/s13063-020-04611-9.
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Sprague, S., Scott, T., Dodds, S. et al. Correction to: Cluster identification, selection, and description in Cluster randomized crossover trials: the PREP-IT trials. Trials 21, 821 (2020). https://doi.org/10.1186/s13063-020-04767-4
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DOI: https://doi.org/10.1186/s13063-020-04767-4