Acute pain in toll like receptor 2 induced synovitis is mediated by the toll like receptor 4 ligand S100A9. Issue 1 (April 2020) - Blom, A.B.; van den Bosch, M.H.; Geven, E.J.; Davidson, E. N. Blaney; Roth, J.; Vögl, T.; van der Kraan, P.M.; van Lent, P.L.