1. E-Learning Department, University of Veterinary Medicine Hannover, Bünteweg 2, 30559 Hannover, Germany. .
2. Department of Physiologic Chemistry, University of Veterinary Medicine Hannover, Bünteweg 17, 30559 Hannover, Germany.
3. Department of Physiologic Chemistry, University of Veterinary Medicine Hannover, Bünteweg 2, 30559 Hannover, Germany.
4. Department of Biochemistry, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, 20–033 Lublin, Akademicka 12, Poland.
5. Department of Pathology and Forensic Veterinary Medicine, Veterinary Faculty, Szent István University, P.O. Box 2, H-1400 Budapest, Hungary.
6. Instruct AG, Kapuzinerstr. 5, 80337 Munich, Germany.
7. Small Animal Clinic, Neurology, University of Veterinary Medicine Hannover, Bünteweg 9, 30559 Hannover, Germany.
8. Didactics and Educational Research in Health Science, University Witten/Herdecke, Alfred-Herrhausen-Strasse 50, 58448 Witten, Germany.