1. Estonian Veterinary and Food Laboratory; Tartu Estonia
2. Institute of Veterinary Medicine and Animal Sciences; Estonian University of Life Sciences Tartu Estonia
3. Friedrich-Loeffler-Institut; Greifswald - Insel Riems Germany
4. Institute of Virology; University of Veterinary Medicine Hannover; Hannover Germany
5. Estonian Veterinary and Food Board; Tallinn Estonia