1. Istituto Zooprofilattico Sperimentale Umbria e Marche; Perugia Italy
2. Dep. of Biopathological Science and Animal and Alimentary Production Hygiene; University of Perugia; Perugia Italy
3. Dep. of Medical-Surgical Specialties; Dermatological Unit of Terni; University of Perugia; Terni Italy