Synovial tissue research: a state-of-the-art review by Orr, C, Sousa, E, Boyle, DL, Buch, MH, Buckley, CD, Cañete, JD, Catrina, AI, Choy, EHS, Emery, P, Fearon, U, Filer, A, Gerlag, D, Humby, F, Isaacs, JD, Just, SA, Lauwerys, BR, Le Goff, B, Manzo, A, McGarry, T, McInnes, IB, Najm, A, Pitzalis, C, Pratt, A, Smith, M, Tak, PP, Thurlings, R, Fonseca, JE, Veale, DJ