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Schluessmann, E; Diel, P; Aghayev, E; Zweig, T; Moulin, P; Röder, C (2009). SWISSspine: a nationwide registry for health technology assessment of lumbar disc prostheses. European spine journal, 18(6), pp. 851-61. Berlin: Springer-Verlag 10.1007/s00586-009-0934-8
