We thank Dr. E. Hamel (Montreal Neurological Institute, McGill University) for the availability of postmortem human trigeminal ganglia. We also gratefully acknowledge the Astra Research Center in Montreal, the Medical Research Council of Canada (MRC), the Savoy Foundation for Epilepsy (SFE), the T2C2 Group, as well as the Fondation des Maladies du Coeur du Québec for their operating support. K.B. is an MRC-Astra postdoctoral Fellow, K.-T.L. holds a PhD studentship from the SFE, and P.S. is a junior Scholar from the Fonds de la Recherche en Santé du Québec.

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