Surgical treatment for unstable low-grade isthmic spondylolisthesis in adults: a prospective controlled study of posterior instrumented fusion compared with combined anterior-posterior fusion.
Swan J, Hurwitz E, Malek F, van den Haak E, Cheng I, Alamin T, Carragee E. Surgical treatment for unstable low-grade isthmic spondylolisthesis in adults: a prospective controlled study of posterior instrumented fusion compared with combined anterior-posterior fusion. Spine J. 2006 Nov-Dec; 6(6):606-14.