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Payer, M., Tessitore, E. L5/S1 disc herniation and S1 pedicle aplasia: case report and review of the literature. Acta Neurochir 156, 757–758 (2014). https://doi.org/10.1007/s00701-014-2005-0
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DOI: https://doi.org/10.1007/s00701-014-2005-0