Rituximab versus tocilizumab in rheumatoid arthritis: synovial biopsy-based biomarker analysis of the phase 4 R4RA randomized trial by Rivellese, F, Surace, AEA, Goldmann, K, Sciacca, E, Çubuk, C, Giorli, G, John, CR, Nerviani, A, Fossati-Jimack, L, Thorborn, G, Ahmed, M, Prediletto, E, Church, SE, Hudson, BM, Warren, SE, McKeigue, PM, Humby, F, Bombardieri, M, Barnes, MR, Lewis, MJ, Pitzalis, C