Effectiveness of muscle stretching exercises with and without laser therapy at tender points for patients with fibromyalgia - Matsutani, Luciana Akemi; Ferreira, Elizabeth Alves Gonçalves; Pereira, Carlos Alberto de Bragança; Lage, Lais Verderame; Assumpção, Ana; Marques , Amélia Pasqual; Casarotto, Raquel Aparecida (Clinical and Experimental Rheumatology, 2007)