- Insulin autoantibodies and high titre islet cell antibodies are preferentially associated with the HLA DQA1*0301-DQB1*0302 haplotype at clinical type 1 (insulin-dependent) diabetes mellitus before age 10 years, but not at onset between age 10 and 40 years. The Belgian Diabetes Registry. Vandewalle, C.L., Decraene, T., Schuit, F.C., De Leeuw, I.H., Pipeleers, D.G., Gorus, F.K. Diabetologia (1993)