[1] McMaster Univ, Fac Hlth Sci, Hamilton, ON, Canada
[2] Virgen Arrixaca Univ Hosp, Intens Care & Chron Pain Treatment, Murcia, Spain
[3] McMaster Univ, Emergency Med, Hamilton, ON, Canada
[4] Hamilton Hlth Sci, 1280 Main St W, Hamilton, ON L8S 4L8, Canada