Research presented by Murphy et al. (2010) suggests that there are important considerations in minimising selection bias in cluster randomised trials.
Murphy, K., Devane, D., Casey, D., Cooney, A., Kirwan, C., Kavanagh, J. & PRINCE Research Team (2010) Minimising selection bias in cluster randomised controlled trials: practical solutions. European Respiratory Society Annual Congress. Barcelona, 18th ‐ 22nd September 2010.
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