1. University of Prince Edward Island
2. Department of Biochemistry & Molecular Biology, Dalhousie University, Halifax, Nova Scotia, B3H 4R2, Canada.
3. Dalhousie University, Halifax, Nova Scotia.
4. Département de Chimie, Université de Montréal, 1375 Ave. Thérèse-Lavoie-Roux, Montréal, Québec, H2V 0B3, Canada.