Audit MicroControls Inc, Eatonton, Ga, has expanded its line of calibration verification and linearity controls with the Linearity FD set of lipid controls for Roche systems. The set of controls is designed to simulate human serum samples for determining linearity, calibration verification, and verification of the reportable range for quantitative assays performed on Roche clinical chemistry analyzers. The Linearity FD set is lyophilized, consisting of five levels that demonstrate a linear relationship to each other when assayed for apolipoprotein A, apolipoprotein B, cholesterol, HDL cholesterol, LDL cholesterol, and triglycerides. The controls have an open-vial stability of 5 days when stored at 2°C to 8°C. For more information, visit Audit MicroControls.