Cardioprotection conferred by exercise training is blunted by blockade of the opioid system - Galvão, Tatiana de Fátima Gonçalves; Matos, Katt C.; Brum, Patrícia Chakur; Negrão, C. E.; Luz, Protásio Lemos da; Chagas, Antonio Carlos Palandri (Clinics, 2011)