Urine proteomics on 54 SLE pts in the Belimumab–Lupus Nephritis trial, compared responders (n 31) v non-responders (n 22), on BEL or SOC. Reduction in urinary CD163 was strongly associated with complete renal response @wk52 & CD23 @wk24 https://t.co/Rais8fKame https://t.co/F3B9W7u7VO