Institution: | 1. Professor of geography at the University of Arizona, Tucson, Arizona 85721;2. [marston@email.arizona.edu].;3. Assistant professor in the Northern Medical Program, University of Northern British Columbia, Prince George, British Columbia V2N 4Z9, and a member of the Faculty of Medicine at the University of British Columbia, Vancouver, British Columbia V6T 1Z4 [deleeuws@unbc.ca]. |