Establishing surrogate kidney endpoints for lupus nephritis clinical trials: development and validation of a novel approach to predict future kidney outcomes by Mackay, M, Dall’Era, M, Fishbein, J, Kalunian, K, Lesser, M, Guerrero, J, Levy, DM, Silverman, E, Petri, M, Arriens, C, Lewis, EJ, Korbet, SM, Conti, F, Tesar, V, Hruskova, Z, Borba, EF, Bonfa, E, Chan, T, Rathi, M, Gupta, KL, Jha, V, Hasni, S, West, MR, Silverman, E, Solomons, N, Houssiau, FA, Diaz, J, Mejia-Vilet, J, Rovin, BH