[1] Univ Calgary, Dept Med, Div Gen Internal Med, Calgary, AB T2N 4N1, Canada
[2] Univ Western Ontario, Robarts Res Inst, Dept Med Physiol, London, ON N6A 3K7, Canada
[3] Univ Western Ontario, Robarts Res Inst, Dept Pharmacol & Toxicol, London, ON N6A 3K7, Canada
[4] Malad Chron, Direct Gen Sante Publ Quebec, Beauport, PQ, Canada