@article{4,
  author = {Zachary Tan and Stewart McLachlin 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},
}