AU - Helenius, Ilkka AU - Remes, Ville AU - Poussa, Mikko TI - Uninstrumented in Situ Fusion for High-Grade Childhood and Adolescent Isthmic Spondylolisthesis: Long-Term OutcomeSurgical Technique PT - JOUR DP - 2008 TA - The Journal of Bone & Joint Surgery PG - 145-152 VI - 90 IP - Supplement_2__Part_1 AID - 10.2106/JBJS.G.01186 [doi] 4100 - http://dx.doi.org/10.2106/JBJS.G.01186 SO - The Journal of Bone & Joint Surgery March 1, 2008 90(Supplement_2__Part_1):145