RT Journal T1 Current Evidence Fails to Show Differences in Effectiveness Between Conservative and Surgical Treatment of Subacromial Impingement Syndrome JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2010 FD February 1 VO 92 IS 2 SP 474 OP 474 DO 10.2106/JBJS.9202.ebo579 UL http://dx.doi.org/10.2106/JBJS.9202.ebo579 AB