1. USC Metabiot, Cnam, 22440 Ploufragan, France
2. USC Metabiot, Anses, Ploufragan-Plouzané-Niort Laboratory, Hygiene and Quality of Poultry and Pig Products Unit, 22440 Ploufragan, France
3. Anses, Fougères Laboratory, Analysis of Residues and Contaminants Unit, 35133 Fougères, France
4. Anses, Ploufragan-Plouzané-Niort Laboratory, Epidemiology, Health and Welfare Unit, 22440 Ploufragan, France