1. Departments of Pathology, Biomedical Engineering, and Surgery, Izaak Walton Killam Health Centre, Dalhousie University Faculty of Medicine, 5850 University Ave., Halifax, Nova Scotia, Canada B3J 3G9
2. Department of Biology, 5076 Life Sciences Bldg., Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J1