@article{defino_williams_williams_george_betz_powell_gaughan_bourlion_2020,  title={DOES THE USE OF DYNAMIC SURGICAL GUIDANCE ASSIST ACCURATE PEDICLE SCREW PLACEMENT IN PATIENTS WITH OSTEOPOROSIS OR OSTEOPENIA?},  volume={19},  ISSN={1808-1851},  url={https://doi.org/10.1590/S1808-185120201903236062},  DOI={10.1590/S1808-185120201903236062},  number={3},  journal={Coluna/Columna},  publisher={Sociedade Brasileira de Coluna},  author={DEFINO, HELTON L A and WILLIAMS, JOHN and WILLIAMS, GEORGIA-LEA and GEORGE, KERI and BETZ, RANDAL and POWELL, DAVID and GAUGHAN, JOHN and BOURLION, MAURICE},  year={2020},  month={Jul},  pages={189–193} }