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Eichenberger, U.; Giani, C.; Petersen-Felix, S.; Graven‐Nielsen, T.; Arendt‐Nielsen, L.; Curatolo, M. (2003). Lumbar epidural fentanyl: segmental spread and effect on temporal summation and muscle pain. British journal of anaesthesia, 90(4), pp. 467-473. Oxford University Press 10.1093/bja/aeg100
