1. Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna “Bruno Ubertini”; Brescia Italy
2. Institute for Environmental Protection and Research; Ozzano nell'Emilia Italy
3. Local Health Unit of Modena Province - Public Health Department; Modena Italy
4. Regione Emilia-Romagna; Service of Collective Prevention and Public Health; Bologna Italy