Harmonising measures of knee and hip osteoarthritis in population-based cohort studies: an international study by Leyland, K, Gates, L, Nevitt, M, Felson, D, Bierma-Zeinstra, S, Conaghan, P, Engebretsen, L, Hochberg, M, Hunter, D, Jones, G, Jordan, J, Judge, A, Lohmander, L, Roos, E, Sanchez-Santos, M, Yoshimura, N, van Meurs, J, Batt, M, Newton, J, Cooper, C, Arden, N

Measuring the variation between self-reported osteoarthritis pain assessments by Leyland, K, Gates, L, Nevitt, M, Felson, D, Ambrose, K, Bierma-Zeinstra, S, Conaghan, P, Engebretsen, L, Hochberg, M, Hunter, D, Jones, G, Jordan, J, Judge, A, Lohmander, S, Roos, E, Sanchez-Santos, M, Sheard, S, Yoshimura, N, van Meurs, J, Batt, M, Newton, J, Cooper, C, Arden, N