Fig. 3From: Assessment of research waste part 1: an exemplar from examining study design, surrogate and clinical endpoints in studies of calcium intake and vitamin D supplementationCumulative meta-analyses of the effect of increased calcium intake (through supplements or dietary sources) with or without vitamin D supplements on femoral neck bone mineral density (BMD) in randomised controlled trials at 1 year (left panel) and 2 years (right panel)Back to article page