AU - Weinstein, James N. AU - Lurie, Jon D. AU - Tosteson, Tor D. AU - Zhao, Wenyan AU - Blood, Emily A. AU - Tosteson, Anna N.A. AU - Birkmeyer, Nancy AU - Herkowitz, Harry AU - Longley, Michael AU - Lenke, Lawrence AU - Emery, Sanford AU - Hu, Serena S. TI - Surgical Compared with Nonoperative Treatment for Lumbar Degenerative SpondylolisthesisFour-Year Results in the Spine Patient Outcomes Research Trial (SPORT) Randomized and Observational Cohorts PT - JOUR DP - 2009 TA - The Journal of Bone & Joint Surgery PG - 1295-1304 VI - 91 IP - 6 AID - 10.2106/JBJS.H.00913 [doi] 4100 - http://dx.doi.org/10.2106/JBJS.H.00913 SO - The Journal of Bone & Joint Surgery June 1, 2009 91(6):1295