Revisiting the taxonomical classification of Porcine Circovirus type 2 (PCV2) : still a real challenge - Franzo, Giovanni (University of Padua. Department of Animal Medicine, Production and Health) ; Cortey, Martí (The Pirbright Institute (Regne Unit)) ; Olvera, Alex (IrsiCaixa - HIVACAT) ; Novosel, Dinko (Croatian Veterinary Institute. Department of Pathology) ; De Castro, Alessandra Marnie Martins Gomes (University of Sao Paulo. Department of Preventive Veterinary Medicine and Animal Health) ; Biagini, Philippe (Unité de Virologie Moléculaire, Emergence et Co-évolution Virale) ; Segalés Coma, Joaquim (Universitat Autònoma de Barcelona. Departament de Sanitat i d'Anatomia Animals) ; Drigo, Michele (University of Padua. Department of Animal Medicine, Production and Health)