The PTPN22 1858T allele but not variants in the proximal promoter region of IL-21 gene is associated with the susceptibility to type 1 diabetes and the presence of autoantibodies in a Brazilian cohort - Mainard-Novo, D. T. O; Santos, A S; Fukui, R T; Gamberini, M; Correia, M R S; Ruiz, M. O; Mangueira, C L P; Matioli, Sergio Russo; Vasconcelos, D M; Silva, M. E. R (Clinical & Experimental Immunology, 2013)