Subpopulations of bovine WC1+ T cells rather than CD4+CD25 Foxp3+ T cells act as immune regulatory cells ex vivo Aad Hoek, Victor P.M.G. Rutten, Jolanda Kool, Ger J.A. Arkesteijn, Ruth J. Bouwstra, Ildiko Van Rhijn and Ad P. KoetsVet. Res., 40 1 (2009) 06DOI: https://doi.org/10.1051/vetres:2008044