tips The cellular signature of urinary immune cells in Lupus nephritis: new insights into potential biomarkers April 3, 2015 Arthritis Research Therapy 2015, 17:94Â doi:10.1186/s13075-015-0600-y Katharina Kopetschke, Jan Klocke, Philipp Enghard and Gabriela Riemekasten contributed equally to this work. Published: 3 April 2015