Affiliation: | Department of Zoology, University College, Lee Maltings, Prospect Row, Cork, Ireland;Department of Veterinary Pathology, University of Liverpool, Veterinary Field Station, Leahurst, Neston, Wirral L64 7TE, U.K.;Veterinary Science Group, Institute of Zoology, Regent's Park, London NW1 4RY, U.K. |