Tests - R ABCDEFGHIJKLMNOPQRSTUVWXYZ24 Hour Rapid Plasma Reagin (RPR) with Reflex to Titer & Confirmation Recirculation Study Renal Function Panel Renin Activity, Plasma Residual Urea Clearance (KrU) (Urine, Urea Clearance) Reticulocyte Count Rheumatoid Factor Rubella Antibody, IgG (German Measles)