1. National Consiliary Laboratory for Diphtheria, Oberschleißheim, Germany
2. MA DTM&H, National Consiliary Laboratory for Diphtheria, Bavarian Health and Food Safety Authority, Oberschleißheim, Germany
3. Chemisches und Veterinäruntersuchungsamt Westfalen, Arnsberg, Germany
4. Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
5. Lower Saxony State Office for Consumer Protection and Food Safety, Food and Veterinary Institute, Hannover, Germany
6. Hessian State Laboratory (LHL), Gießen, Germany
7. Chemisches und Veterinäruntersuchungsamt Stuttgart, Fellbach, Germany