1. Faculty of Veterinary Medicine; Preclinical Institute; Latvia University of Agriculture; K. Helmaņa iela 8 Jelgava LV-3004 Latvia
2. Department of Pharmaceutical Chemistry; Faculty of Pharmacy; Riga Stradiņš University; Dzirciema iela 16 Rīga LV-1007 Latvia
3. Department of Veterinary Medicine; University of Cambridge; Madingley Road Cambridge CB3 0ES UK