CD4 and type 1 diabetes mellitus: Investigators at all 4 research sites, ITN, SRDRI, MCW, and UQ, were asked to identify flow cytometry data from their own group generated using PBMCs from people within 3 months of diagnosis with T1D stained with a panel of antibodies that were specific for CD3, CD4, CD25, and CD127 (n = 12 for ITN, n = 39 for SRDRI, n = 22 for MCW, and n = 11 for UQ).