Controlled medial branch anesthetic block in the diagnosis of chronic lumbar facet joint pain: the value of a three-month follow-up - Rocha, Ivan Dias da; Cristante, Alexandre Fogaça; Marcon, Raphael Martus; Oliveira, Reginaldo Perilo; Letaif, Olavo Biraghi; Barros Filho, Tarcisio Eloy Pessoa de (Clinics, 2014)