Association of Mu opioid receptor (A118G) and BDNF (G196A) polymorphisms with rehabilitation-induced cortical inhibition and analgesic response in chronic osteoarthritis pain Fernanda de Toledo Gonçalves; Kevin Pacheco-Barrios; Ingrid Rebello-Sanchez; Luis Castelo-Branco; Paulo S. de Melo; Joao Parente; Alejandra Cardenas-Rojas; Isabela Firigato; Anne Victorio Pessotto; Marta Imamura; Marcel Simis; Linamara Battistella; Felipe Fregni;