RECOMMENDATIONS FOR STANDARDIZATION AND PHENOTYPE DEFINITIONS IN GENETIC STUDIES OF OSTEOARTHRITIS: THE TREAT-OA CONSORTIUM por Kerkhof, H, Meulenbelt, I, Arden, N, Cooper, C, Doherty, M, Felson, D, Gonzalez, A, Ikegawa, S, Jiang, Q, Jonsdottir, I, Kujala, U, Lane, N, Leino-Arjas, P, Lohmander, S, Luyten, F, Nevitt, M, Slagboom, E, Spector, T, Stefansson, K, Tamm, A, Tsezou, A, Wilkinson, J, Yoshimura, N, Valdes, A, van Meurs, J