Fig. S1. (a) Individual values of serum aTGF-β1 in the three groups of Sardinian school children. Bars represent mean. (b) Relationship between serum aTGF-β1 values and time to diabetes onset in the IrAb+ school children who developed T1D. TGF-β1 values were modelled as a fractional polynomial function (degree = 3) of time to diabetes onset in the pre-diabetic individuals from the general population.

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