J. Frøkjæer, B. Deleuran, M. Lind, S. Overgaard, K. Søballe, and C. Bünger, “Polyethylene particles stimulate monocyte chemotactic and activating factor production in synovial mononuclear cells in vivo:An immunohistochemical study in rabbits”, ActaO, vol. 66, no. 4, pp. 303–307, Jan. 1995.