1. Department of Medical Biology, Faculty of Medicine, University of Szeged, Somogyi B. u. 4., 6720 Szeged, Hungary
2. Veterinary Diagnostic Directorate of the National Food Chain Safety Office, Tábornok u. 2., 1143 Budapest, Hungary
3. Department of Genetics, School of Medicine, Stanford University, 300 Pasteur Dr, Stanford, California, USA