Urinary monocyte chemoattractant protein-1 (MCP-1) is a marker of active renal vasculitis. - Tam, FWK; Sanders, JS; George, A; Hammad, T; Miller, C; Dougan, T; Cook, HT; Kallenberg, CG; Gaskin, G; Levy, JB; Pusey, CD (Nephrol Dial Transplant, 2004)