Figure 1From: Enhanced implementation of low back pain guidelines in general practice: study protocol of a cluster randomised controlled trial Chart of expected flow of clusters and patients throughout the trial. Actual numbers of clusters, average cluster size, and variance of cluster sizes, number of patients contributing data for the primary outcome, as well as number of patients participating with questionnaires will be concluded in reporting of results. *In three practices, single GPs are excluded from participation without excluding the total practice.Back to article page