1. 1 Department for Residue Analysis, Croatian Veterinary Institute HR-10000 Zagreb, Savska cesta 143, Croatia
2. 2 Department for Residue Analysis, Croatian Veterinary Institute HR-10000 Zagreb, Savska cesta 143, Croatia
3. 3 Department for Residue Analysis, Croatian Veterinary Institute HR-10000 Zagreb, Savska cesta 143, Croatia