The Wearing-Off of OnabotulinumtoxinA in Patients with Chronic Migraine: Experience of a Tertiary Portuguese CentreAutoresCatarina Fernandes, Bruno Silva, Joana Ramos-Lopes, Isabel LuzeiroLer artigoThis browser does not support PDFs. Please download the PDF to view it: Download PDF.DownloadSecção:Artigos Originais