[1] McGill Univ, Dept Psychol, Montreal, PQ, Canada
[2] Univ Alabama Birmingham, Dept Psychol, Birmingham, AL 35294 USA
[3] Hosp Sick Children, Program Neurosci & Mental Hlth, Toronto, ON M5G 1X8, Canada
[4] Univ Toronto, Dept Physiol, Toronto, ON, Canada
[5] Univ Toronto, Ctr Study Pain, Toronto, ON, Canada
[6] Duke Univ, Med Ctr, Dept Anesthesiol, Durham, NC 27710 USA
[7] McGill Univ, Fac Dent, Montreal, PQ, Canada
[8] Hosp Sick Children, Cell Biol Program, Toronto, ON M5G 1X8, Canada
[9] McGill Univ, Alan Edwards Ctr Res Pain, Montreal, PQ, Canada