DEFINITION OF OSTEOARTHRITIS ON MRI: RESULTS OF A DELPHI EXERCISE by Hunter, D, Arden, N, Conaghan, P, Eckstein, F, Gold, G, Guermazi, A, Harvey, W, Jones, G, Le Graverand, M, Laredo, J, Lo, G, Losina, E, Mosher, T, Roemer, F, Zhang, W