1 Department of Pharmacology, 9-62 Medical Sciences Building, University of Alberta, Edmonton T6G 2H7, Canada. Electronic address: fplane@ualberta.ca.
2 Department of Nursing Science, Faculty of Nursing, MacEwan University, 9-503 L Robbins Health Learning Centre, 10700-104 Ave, Edmonton AB T5J 4S2, Canada. Electronic address: kerrp7@macewan.ca.