Junaid, M., Afzal, A., Kalsoom, A., & Bukhari, S. S. (2019). Freehand pedicle screw fixation: A safe recipe for dorsal, lumbar and sacral spine: Freehand pedicle screw fixation. Pakistan Journal of Medical Sciences, 35(3). https://doi.org/10.12669/pjms.35.3.981