@article{4, author = {Zachary Tan and McLachlin Stewart and Cari Whyne and Joel Finkelstein}, title = {Validation of a freehand technique for cortical bone trajectory screws in the lumbar spine}, year = {2019}, journal = {Journal of Neurosurgery: Spine}, volume = {31}, number = {2}, pages = {201-208}, publisher = {American Association of Neurological Surgeons}, }