- No evidence of association between HLA-DRB1 and attention deficit hyperactivity disorder. Payton, A., Turic, D., Langley, K., Mills, S., Lawson, D.C., Van den Bree, M., Owen, M.J., O'Donovan, M.C., Ollier, W., Worthington, J., Thapar, A. Psychiatr. Genet. (2003)