[1] McMaster Univ, Hamilton, ON, Canada
[2] Merck Canada Inc, Montreal, PQ, Canada
[3] Dalhousie Univ, Halifax, NS, Canada
[4] Western Univ, London, ON, Canada
[5] McGill Univ, Montreal, PQ, Canada
[6] Canadian Heart Res Ctr, Toronto, ON, Canada
[7] Queens Univ, Kingston, ON, Canada
[8] Laval Univ, Quebec City, PQ, Canada
[9] Family Phys Airway Grp Canada, Toronto, ON, Canada
[10] Univ Calgary, Calgary, AB, Canada