HLA-DRB1 and primary adrenal insufficiency: The LTR13-DQB1 indel was linked to six different DRB1-MTCO3P1 haplotypes (Supplementary Table 4), some of which might be useful for predicting the onset of T1D and/or Addison’s disease in multiple populations (Valdes et al., 2012; Vadva et al., 2019).