The HLA-DQB1 genotype frequency in the Botnia study in patients diagnosed with type 1 diabetes in adult age, in subgroups
of patients diagnosed with type 2 diabetes according to family history for both type 1 and type 2 diabetes (mixed type 1/2)
or for type 2 only (common type 2), and in control subjects without family history for diabetes. ▪, GAD antibody–positive
patients; □, GAD antibody–negative patients. Adapted from Li et al. (19). © 2001, The Endocrine Society.