No HLA data exist for AZA-GI-INT, yet its lowest allele positivity—absent in kidney donors (HLA-DRB1*07:01)—suggests that, like AZA-AP, both AZA-GI-INT and even controls (IBD without AZA-ADRs) may share IBD-related HLA backgrounds. Here, HLA-DRB1 is linked to inflammatory bowel disease.