Reply to letter to the editor: 'effect of the dr. Bart application on healthcare use and clinical outcomes in people with osteoarthritis of the knee and/or hip in the Netherlands — a randomized controlled trial'. Issue 11 (November 2020) - Pelle, T.; Bevers, K.; van der Palen, J.; van den Hoogen, F.H.J.; van den Ende, C.H.M.