1. ; Department of Human Nutrition; St. Francis Xavier University; P.O. Box 5000 B2G 2W5 Antigonish Nova Scotia Canada
2. ; Division of Food Science; Institute of Animal Reproduction and Food Research of Polish Academy of Sciences; Olsztyn Poland
3. ; Department of Biochemistry; Memorial University of Newfoundland; A1B 3X9 St. John's Newfoundland Canada