P10. Multisurgeon assessment of thoracolumbar fractures: reproducibility and repeatability of the AO and Denis classification systems Kirkham Wood, MD, Alexander Vacarro, MD, David Polly, MD, Amir Mehbod, MD, G. Khanna, MD, Jill Wroblewski, MS; University of Minnesota, Minneapolis, MN, USA; Rothman Institute, Philadelphia, PA, USA; Walter Reed Medical Center, Chevy Chase, MD, USA; Twin Cities Spine Center, Minneapolis, MN, USA