[1] Hosp Sick Children, Res Inst, Child Hlth Evaluat Sci, Toronto, ON, Canada
[2] Univ Calgary, Dept Psychol, Calgary, AB, Canada
[3] York Univ, Dept Psychol, Toronto, ON, Canada
[4] Toronto Gen Hosp, Dept Anesthesia & Pain Management, Transit Pain Serv, Toronto, ON, Canada
[5] Toronto Gen Hosp, Dept Anesthesia & Pain Management, Pain Res Unit, Toronto, ON, Canada
[6] Univ Toronto, Dept Anesthesiol & Pain Med, Toronto, ON, Canada