Acknowledgements
This work was partially funded by CEVA Santé Animale (swIAV analysis).
Silvana Sosa Portugal was supported by an FIP fellowship of Universitat
Autònoma de Barcelona thanks to fundingof CEVA Santé Animale. Our
grateful thanks to Gwenaelle Dauphin, Kathrin Lillie-Jaschinski and
Stefan Pesch for the critical reading of the manuscript.