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Figure 5: Insulin output by islets from NF control rats (open circles), IF control rats (closed circles), and CR control rats (open triangles) incubated at increasing concentrations of D-glucose. All results are expressed relative to the overall mean values recorded at the three concentrations of the hexose in each type of rats. Mean values (±SEM) refer to 10 (NF and CR rats) or 20 (IF rats) separate measurements, the SEM bar ending by an arrow whenever it exceeded the space to the next mean value. The solid line refers to the overall mean value recorded in the three groups of rats at each hexose concentration.