1. Anses, Laboratory of Ploufragan/Plouzané, Unit of Viral Genetics and Biosafety, Ploufragan, France
2. Clinique VET Flandres, Hazebrouck, France
3. Anses, Laboratory of Ploufragan/Plouzané, Unit of Porcine Epidemiology and Welfare, Ploufragan, France