European Food Safety Authority, European Centre for Disease Prevention and Control, European Union Reference Laboratory for Avian Influenza, Cornelia Adlhoch, Adam Brouwer, Thijs Kuiken, Paolo Mulatti, Krzysztof Smietanka, Christoph Staubach, Irene Mu oz Guajardo, Frank Verdonck, Laura Amato, Francesca Baldinelli