Correction to: Cluster identification, selection, and description in Cluster randomized crossover trials: the PREP-IT tr

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CORRECTION

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Correction to: Cluster identification, selection, and description in Cluster randomized crossover trials: the PREP-IT trials Sheila Sprague1,2*, Taryn Scott1, Shannon Dodds1, David Pogorzelski1, Paula McKay1, Anthony D. Harris3, Amber Wood4, Lehana Thabane2, Mohit Bhandari1,2, Samir Mehta5, Greg Gaski6, Christina Boulton7, Francesc Marcano-Fernández8, Ernesto Guerra-Farfán9, Joan Hebden10, Lyndsay M. O’Hara3, Gerard P. Slobogean11 and on behalf of the PREP-IT Investigators Correction to: Trials 21, 712 (2020) http://orcid.org/10.1186/s13063-020-04611-9 Following publication of the original article [1], we were notified that the PREP-IT Investigators were not listed as contributors. They are all listed in Supplementary file 1 linked to this erratum.

Supplementary information Supplementary information accompanies this paper at https://doi.org/10. 1186/s13063-020-04767-4. Additional file 1. Author details Department of Surgery, Division of Orthopaedic Surgery, McMaster University, 293 Wellington Street North, Suite 110, Hamilton, ON L8L 8E7, Canada. 2Department of Health Research Methods, Evidence, and Impact, McMaster University, 293 Wellington St. N., Suite 110, Hamilton, ON L8L 8E7, Canada. 3Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA. 4Association of periOperative Registered Nurses, Denver, CO, USA. 5Department of Orthopaedic Surgery, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA. 6Department of Orthopaedic Surgery, 1

Indiana University School of Medicine, Indianapolis, IN, USA. 7Department of Orthopaedics, Banner Health and the University of Arizona-Tucson, Tucson, AZ, USA. 8Orthopedic Department, Parc Taulí Hospital Universitari, Institut d’Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Sabadell, Spain. 9Department of Orthopaedic Surgery and Traumatology, University Hospital Vall d’Hebron, Barcelona, Spain. 10Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA. 11 Department of Orthopaedics, University of Maryland, R Adams Cowley Shock Trauma Center, Baltimore, MD, USA.

Reference 1. 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.

The original article can be found online at https://doi.org/10.1186/s13063020-04611-9. * Correspondence: [email protected] 1 Department of Surgery, Division of Orthopaedic Surgery, McMaster University, 293 Wellington Street North, Suite 110, Hamilton, ON L8L 8E7, Canada 2 Department of Health Research Methods, Evidence, and Impact, McMaster University, 293 Wellington St. N., Suite 110, Hamilton, ON L8L 8E7, Canada Full list of author information is available at the end of the article © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution a