Efficacy of low level laser therapy associated with exercises in knee osteoarthritis: a randomized double-blind study - Alfredo, Patrícia Pereira; Bjordal, Jan Magnus; Dreyer, Sílvia Helena; Meneses, Sarah Rúbia Ferreira; Zaguetti, Giovana; Ovanessian, Vanessa; Fukuda, Thiago Yukio; Steagall Junior, Washington; Martins, Rodrigo Álvaro Brandão Lopes; Casarotto, Raquel Aparecida; Marques, Amélia Pasqual (Clinical Rehabilitation, 2012)