Regulatory T cell responses in participants with type 1 diabetes after a single dose of interleukin-2: A non-randomised, open label, adaptive dose-finding trial by Todd, J, Evangelou, M, Cutler, A, Pekalski, M, Walker, N, Stevens, H, Porter, L, Smyth, D, Rainbow, D, Ferreira, R, Esposito, L, Hunter, K, Loudon, K, Irons, K, Yang, J, Bell, C, Schuilenburg, H, Heywood, J, Challis, B, Neupane, S, Clarke, P, Coleman, G, Dawson, S, Goymer, D, Anselmiova, K, Kennet, J, Brown, J, Caddy, S, Lu, J, Greatorex, J, Goodfellow, I, Wallace, C, Tree, T, Evans, M, Mander, A, Bond, S, Wicker, L, Waldron-Lynch, F