[1] Northwestern Univ, Sch Med, Dept Biol Chem & Mol Pharmacol, Chicago, IL 60611 USA
[2] Univ Paris 06, Hop St Antoine, INSERM, Unite Mixte 732, F-75016 Paris, France
[3] Hop St Antoine, AP HP, Dept Neurol, F-75012 Paris, France
[4] Univ Groningen, Univ Med Ctr Groningen, Dept Neurosci, Med Physiol Sect, NL-9713 AV Groningen, Netherlands
[5] Univ New Mexico, Hlth Sci Ctr, Dept Neurosci, Albuquerque, NM 87131 USA
[6] Loyola Univ, Dept Cell Biol Neurobiol & Anat, Maywood, IL 60626 USA
[7] McGill Univ, Alan Edwards Ctr Res Pain, Montreal, PQ H3A 2B2, Canada