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This is the peer reviewed version of the following article: Hooper, R., Teerenstra, S., de Hoop, E., and Eldridge, S. (2016) Sample size calculation for stepped wedge and other longitudinal cluster randomised trials. Statist. Med., doi: 10.1002/sim.7028, which has been published in final form at http://dx.doi.org/10.1002/sim.7028. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
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