Jacqueline A Pettersen1, Anurag Singh2. 1. Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada; Northern Medical Program, University of Northern British Columbia, Prince George, British Columbia, Canada. Electronic address: pettersj@unbc.ca. 2. Northern Medical Program, University of Northern British Columbia, Prince George, British Columbia, Canada; Division of Nephrology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.