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? 

To preserve the integrity of ethanol in a blood specimen, which of the following practices is recommended?

Which of the following best summarizes the clinical relevance of serum ferritin measurement? 

Why has a reference measurement procedure not been established for FT3?

What condition results from excess ADH secretion?

Which factor can increase the rate of in vitro glycolysis in blood samples? 

What is the functional sensitivity of 3rd generation TSH assays?