Melatonin analgesia is associated with improvement of the descending endogenous pain-modulating system in fibromyalgia: a phase II, randomized, double-dummy, controlled trial

nork de Zanette, Simone Azevedo, Vercelino, Rafael, Laste, Gabriela, Rozisky, Joanna Ripoll, Schwertner, André, Machado, Caroline Buzzatti, Xavier, Fernando, de Souza, Izabel Cristina Custódio, Deitos, Alicia, Torres, Iraci L S, Caumo, Wolnei
Argitaratua 2014