TY - JOUR AU - Postacchini, Franco DO - doi:10.1302/0301-620X.88BSUPP_I.0880004b UR - https://doi.org/10.1302/0301-620X.88BSUPP_I.0880004b TI - DEGENERATIVE SPONDYLOLISTHESIS T2 - Orthopaedic Proceedings VL - 88-B IS - SUPP_I PY - 2006 SP - 4 EP - 4 ER -