- CD4(+)CD3(-) accessory cells costimulate primed CD4 T cells through OX40 and CD30 at sites where T cells collaborate with B cells. Kim, M.Y., Gaspal, F.M., Wiggett, H.E., McConnell, F.M., Gulbranson-Judge, A., Raykundalia, C., Walker, L.S., Goodall, M.D., Lane, P.J. Immunity (2003)