Effectiveness of Surgery for Lumbar Spinal Stenosis: A Systematic Review and Meta-Analysis Machado, Gustavo C. ; Ferreira, Paulo H. ; Harris, Ian A. ; Pinheiro, Marina B. ; Koes, Bart W. ; van Tulder, Maurits ; Rzewuska, Magdalena ; Maher, Chris G. ; Ferreira, Manuela L. Abstract Publication: PLoS ONE Pub Date: March 2015 DOI: 10.1371/journal.pone.0122800 Bibcode: 2015PLoSO..1022800M