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Hein, O., Haase, J. Proceedings of the 35th Annual Meeting of the Nordisk Neurokirurgisk Forening (Scandinavian Neurosurgical Society) June 1–4, 1983, Helsinki, Finland. Acta neurochir 78, 65–75 (1985). https://doi.org/10.1007/BF01809243
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DOI: https://doi.org/10.1007/BF01809243