1. Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute of Animal Health, Südufer 10, 17493 Greifswald – Insel Riems, Germany
2. Present address: Department of Pharmacology, University Medicine of Greifswald, Center of Drug Absorption and Transport (C_DAT), Felix-Hausdorff Straße 3, 17487 Greifswald, Germany.