Affiliation: | (1) Department of Medicine, University of Manitoba, 770 Bannatyne Ave., R3E 0W3 Winnipeg, Canada;(2) Department of Physiology, University of Manitoba, 770 Bannatyne Ave., R3E 0W3 Winnipeg, Canada;(3) Present address: Dept. of Physiology and Physics, University of Washington School of Medicine, Seattle, WA, USA |