aUniversité Côte d'Azur, CNRS, IPMC, LabEx ICST, FHU InovPain, Valbonne, France. Negm is now with the Université Clermont-Auvergne, Laboratoire Neurodol, UMR 1107 Inserm, Clermont-Ferrand, France

bUniversité Côte d’Azur, CNRS, IPMC, LabEx SIGNALIFE, Valbonne, France

cUniversité Côte d’Azur, CNRS, IPMC, Valbonne, France

*Corresponding author. Address: UMR 7275 CNRS, 660 Route des Lucioles, 06560 Valbonne, France. Tel.: +33 4 9395 3421; fax: +33 4 9395 7708. E-mail address: [email protected] (J. Noel).

Sponsorships or competing interests that may be relevant to content are disclosed at the end of this article.

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C. Rovere and J. Noel contributed equally.