Guideline for the classification, diagnosis and treatment of fibromyalgia. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 25, n. 5, p. 608–10, 2009. DOI: 10.32385/rpmgf.v25i5.10681. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10681. Acesso em: 18 apr. 2026.