BAAT and type 1 diabetes mellitus: These different alleles associated with T1D were not mutually independent and linkage disequilibrium was observed between TNFa2b1 and DQA1*0101-DQB1*0501 (p = 9 × 10-5; D' = 0.34), BAT-2*2 and DQA1*0201-DQB1*0202 (p = 4 × 10-7; D' = 0.36) and weak LD between TNFa10b4 and DQA1*0103-DQB1*0603 (p = 0.09; D' = 0.16).