TY - JOUR AU - Longo, U. G. AU - Loppini, M. AU - Romeo, G. AU - Maffulli, N. AU - Denaro, V. DO - doi:10.1302/0301-620X.94B11.29553 UR - https://doi.org/10.1302/0301-620X.94B11.29553 TI - Errors of level in spinal surgery T2 - The Journal of Bone & Joint Surgery British Volume VL - 94-B IS - 11 PY - 2012 SP - 1546 EP - 1550 ER -