FUSION DID NOT IMPROVE OUTCOME IN DECOMPRESSIVE SURGERY FOR LUMBAR SPINAL STENOSIS A 2-YEAR FOLLOW-UP STUDY OF 5390 PATIENTS FROM SWESPINE: O31.Försth Peter MD; Michaëlsson, Karl MD, Prof; Sandén, Bengt MD, PhDSpine Journal Meeting Abstracts: 2013 - Volume - Issue - ppg 22-23 Free