A significant residual osmolal gap—after correcting for ethanol—of greater than what value generally suggests the presence of other volatile alcohols? 

What is a key difference between DHEA and DHEA-S concentrations?

Which of the following is a procedure that is used to substantiate the continued accuracy of the test system throughout the laboratory reportable range of the tests result of the test system?

In regards to a Gaussian distribution, ±2 s from the mean encompasses _____ of values.

Which of the following non-drug substances may interfere with TDM assay results? 

What is the primary use of AFP measurement in maternal serum and amniotic fluid?

For blood lead analysis, which specimen is considered the specimen of choice and why? 

Why might a normal serum creatinine concentration not necessarily indicate normal kidney function? 

What is the most common cause of death in patients with acromegaly?

In dry, multilayer, slide-automated systems for glucose measurement, a small (10-μL) sample is placed on a porous film over a reagent layer. How is the glucose concentration determined in this system?