Department of Psychology, York University, Canada
Department of Anesthesia and Pain Management, Toronto General Hospital, Canada
Mount Sinai Hospital, Department of Anesthesia, University of Toronto, Toronto, ON, Canada
*Address: Department of Psychology, York University, 4700 Keele St., BSB 232, Toronto, ON, Canada M3J 1P3. Tel.: +1 416 731 2100x40557.
Submitted October 29, 2011; revised and accepted October 31, 2011.