Bardoxolone methyl and kidney function in CKD with type 2 diabetes - Pergola, P E; Raskin, P; Toto, R D; Meyer, C J; Huff, J W; Grossman, E B; Krauth, M; Ruiz, S; Audhya, P; Christ-Schmidt, H; Wittes, J; Warnock, D G; BEAM Study Investigators (N Engl J Med, 2011)