Interleukin-12 enhances CD26 expression and dipeptidyl peptidase IV function on human activated lymphocytes Cordero, O.J.; Salgado, F.J.; ViƱuela, J.E.; Nogueira, M. Immunobiology 197(5): 522-533 1997 0171-2985 10.1016/s0171-2985(97)80084-8 https://eurekamag.com/research/008/898/008898701.php