1. Department
of Chemistry, University of Alberta, 11227 Saskatchewan Dr NW, Edmonton, Alberta T6G 2G2, Canada
2. FAO/WHO
Collaborating Centre for Brucellosis, OIE Brucellosis Reference Centre,
Department of Bacteriology, Animal Health and Veterinary Laboratories Agency, Woodham Lane, Addlestone, Surrey, United Kingdom KT15 3NB