[1] Univ Padua, Dept Comparat Biomed & Food Sci, Viale Univ 16, I-35020 Legnaro, Italy
[2] Unita Locale Sociosanit 6 Euganea, Via Enrico Scrovegni 14, I-35012 Padua, Italy
[3] Univ Milan, Dept Vet Med & Anim Sci, Via Univ 6, I-26900 Lodi, Italy
[4] French Agcy Food Environm & Occupat Hlth & Safety, Epidemiol Hlth & Welf Unit, F-22440 Ploufragan, France