[1] Univ Milan, Dept Biomed Surg & Dent Sci, Via Pascal 36, I-20133 Milan, Italy
[2] Vet Hosp San Michele, Via 1 Maggio 37, I-26838 Lodi, Italy
[3] Univ Perugia, Dept Vet Med, Via San Costanzo 4, I-06126 Perugia, Italy
[4] IRCCS, Neurol Inst C Besta, Cellular Neurobiol Lab, Dept Cerebrovasc Dis, Via Celoria 11, I-20133 Milan, Italy
[5] Ist Zooprofilatt Sperimentale Sicilia A Mirri, Area Diagnost Virol, Palermo, Italy
[6] IRCCS, Galeazzi Orthopaed Inst, Milan, Italy