Establishment and Characterization of an SV40 Large T Antigen-Transduced Porcine Colonic Epithelial Cell Line (Bastian Kaiser, Martina Boettner, Thilo Wedel, Ronald M. Brunner, Tom Goldammer, Szilvia Lesko, Gotthold Gäbel, Alexander Gleich, Helga Pfannkuche)