Preliminary effects of a regional approached multidisciplinary educational program on healthcare utilization in patients with hip or knee osteoarthritis: an observational study oleh Aniek A. O. M. Claassen, Henk J. Schers, Sander Koëter, Willemijn H. van der Laan, Keetie C. A. L. C. Kremers-van de Hei, Joris Botman, Vincent J. J. F. Busch, Wim H. C. Rijnen, Cornelia H. M. van den Ende