[1] Univ Vet Med Vetmeduni, Farm Anim & Vet Publ Hlth, Vienna, Austria
[2] Agence Natl Securite Sanit Alimentat Environm & T, Ploufragan Plouzane Lab, Ploufragan, Austria
[3] Austrian Agcy Hlth & Food Safety AGES, Div Anim Hlth, Graz, Austria
[4] German Fed Inst Risk Assessment BfR, Dept Biol Safety, Berlin, Germany
[5] Ist Zooprofilatt Sperimentale Abruzzo & Molise G, Teramo, Italy
[6] Estonian Univ Life Sci, Inst Vet Med & Anim Sci, Tartu, Estonia
[7] Natl Vet Res Inst, Dept Swine Dis, Pulawy, Poland
[8] Anim & Plant Hlth Agcy, London, England
[9] Univ Utrecht, Fac Vet Med, Dept Populat Hlth Sci, Utrecht, Netherlands