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Anatomical Safe Zone of Sacral Ala for Ventrolateral Sacral(S1) Screw Placement: Re-evaluation of Its Effectiveness.
Jae Won Doh, Edward C Benzel, Kyeong Seok Lee, Hack Gun Bae, Il Gyu Yun, Soon Kwan Choi, Bark Jang Byun
J Korean Neurosurg Soc. 1998;27(3):291-298.
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