Affiliation: | Department of Natural Resources, University of New Hampshire, Pettee Hall, Durham, NH 03824-3599, USA.;Departamento de Patologia Animal-Parasitoliga, Facultad de Veterinaria, Miguel Servet 177, 5001 3 Zaragoza, Spain;ATECMA, c/o Donoso Cortes 8, 28015 Madrid, Spain |