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N. Bernheim, A. Doyen, P. Eloy, S. Halewyck, P. W. Hellings, N. Mardyla, J. B. Watelet
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P. Eloy, S. Vlaminck, M. Jorissen, P. W. Hellings, M. Timmermans, J. Daele, P. Ransky, S. Hassid, T. Van Zele, C. Bachert, A. L. Poirrier, B. Bertrand
(B-ENT 2011; 7: 3-13)
T. D. Nyembue, A.-S. Vinck, K. Corvers, L. Bruninx, P. W. Hellings, M. Jorissen
(B-ENT 2011; 7: 79-85)
P.W. Hellings, G. Hens, J. Schoenaers, M. Jorissen, V. Vander Poorten
(B-ENT 2010; 6: 97-101)
P. W. Hellings, P. Rombaux
(B-ENT 2009; 5: 71-75)