CXCR3+CD4+ T Cells Are Enriched in Inflamed Kidneys and Urine and Provide a New Biomarker for Acute Nephritis Flares in Systemic Lupus Erythematosus Patients. - Enghard, P.; Humrich, J. Y.; Rudolph, B.; Rosenberger, S.; Biesen, R.; Kuhn, A.; Manz, R.; Hiepe, F.; Radbruch, A.; Burmester, G.-R.; Riemekasten, G. (Arthritis & Rheumatism, 2009)