Melatonin treatment decreases c-fos expression in a headache model induced by capsaicin - Tanuri, Fabiano C.; Lima, Eliângela de; Peres, Mario F. P.; Cabral, Francisco R.; Naffah-Mazzacoratti, Maria da Graça; Cavalheiro, Esper Abrão; Cipolla Neto, José; Zukerman, Eliova; Amado, Débora (Journal of Headache and Pain, 2009)