[1]
F. B. Christensen, M. Laursen, J. Gelineck, E. S. Hansen, and C. E. Bünger, “Posterolateral spinal fusion at unintended levels due to bone-graft migration: No effect on clinical outcome in 19/130 patients”, ActaO, vol. 72, no. 4, pp. 354–358, Jan. 2001.