1. Department of Biochemistry; Memorial University of Newfoundland; St. John's Newfoundland A1B 3X9 Canada
2. Department of Chemistry; University of Quebec at Montreal; CP 8888 Montreal H3C 3P8 Qc Canada
3. Division of Laboratory Medicine, Faculty of Medicine; Memorial University of Newfoundland; Health Sciences Centre, 300 Prince Philip Drive St. John's Newfoundland A1B 3V6 Canada
4. Fisheries and Oceans Canada; Science Branch, Special Projects; St John's NL A1C 5X1 Canada