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Braun, T; Betz, C S; Ledderose, G J; Havel, M; Stelter, K; Kuhnel, T; Strauss, G; Waschke, J; Kirchner, T; Briner, H R; Simmen, D; Caversaccio, M; Wormald, P J; Jones, N; Leunig, A (2012). Endoscopic sinus surgery training courses: benefit and problems - a multicentre evaluation to systematically improve surgical training. Rhinology, 50(3), pp. 246-54. Leiden, NL: International Rhinologic Society 10.4193/Rhino11.266
