aInserm U987 “Pathophysiology and Pharmacology Pain Clinic,” Centre for Evaluation and Treatment of Pain, Ambroise Paré Hospital, Boulogne-Billancourt, France
bInserm UMR 894 Center of Psychiatry and Neurosciences, Team “Pain, Stress & Neuroinflammation”, Sainte-Anne Hospital, Paris, France
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Received September 22, 2015
Accepted September 23, 2015