1. National Reference Laboratory for Honey bee Health, Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell’Università 10, 35020 Legnaro (Padova), Italy
2. Istituto Zooprofilattico Sperimentale del Mezzogiorno, Località Catona, Via Figurella, snc 89135 Reggio di Calabria, Italy
3. Central Directorate for Health, Social Policies and Disabilities, Friuli Venezia Giulia Region, Trieste, Italy
4. Animal Health and Welfare Department, Ministry for Agriculture, Fisheries and Animal Rights, Abattoir Street, Albert Town, Marsa, Malta