TY - JOUR AU - O’Dowd, John DO - doi:10.1302/0301-620X.81B1.0810184 UR - https://doi.org/10.1302/0301-620X.81B1.0810184 TI - AO/ASIF principles in spine surgery. T2 - The Journal of Bone & Joint Surgery British Volume VL - 81-B IS - 1 PY - 1999 SP - 184 EP - 184 ER -