Computer Science Department, University of Western Ontario, London N6A 5B8, Canada Bioinformatics Solutions Inc., 145 Columbia Street West, Waterloo, Ont. N2L 3L2, Canada.|Computer Science Department, University of Western Ontario, London N6A 5B8, Canada Bioinformatics Solutions Inc., 145 Columbia Street West, Waterloo, Ont. N2L 3L2, Canada.|Computer Science Department, University of Western Ontario, London N6A 5B8, Canada Bioinformatics Solutions Inc., 145 Columbia Street West, Waterloo, Ont. N2L 3L2, Canada.