[1] VLA Weybridge, Community Reference Lab Avian Influenza & Newcast, Addlestone KT15 3NB, Surrey, England
[2] Univ Ghent, B-9820 Merelbeke, Belgium
[3] LERAPP, Agence Francaise Secur Sanitaire Aliments, F-22440 Ploufragan, France
[4] Cent Vet Inst, NL-8200 AB Lelystad, Netherlands
[5] Ist Zooprofilatt Sperimentale Lombardia & Emilia, Sez Parma, I-43100 Parma, Italy
[6] Tech Univ Denmark, Natl Vet Inst, DK-1790 Copenhagen V, Denmark
[7] Univ Marburg, Inst Virol, D-35043 Marburg, Germany
[8] Merial, F-69007 Lyon, France
[9] Labs HIPRA, Amer Girona 17170, Spain
[10] Fed Res Inst Aninial Hlth, Friedrich Loeffler Inst, D-17493 Greifswald, Germany
[11] Ist Zooprofilatt Sperimentale Padova, I-35020 Padua, Italy