1. Canadian Food Inspection Agency (CFIA), Centre for Veterinary Dmg Residues (CVDR) Laboratory, 116 Veterinary Rd, Saskatoon SK, S7N 2R3
2. U.S. Food and Drug Administration, Office of Regulatory Affairs, Animal Drugs Research C nter, Denver Federal Center Bldg 20, W. 6th Ave and Kipling St, Denver, CO 80225