What disorder primarily affects children under five and is diagnosed by elevated urine vanillylmandelic acid/VMA and urine homovanillic acid/HMA levels?

This analyte is high in RBCs, so hemolysis should be avoided.

Immunoassays are used for 

Which of the following lipoproteins has the highest percentage of total lipid?

Night blindness is associated with deficiency of which of the following vitamins?

Which of the following would be the routine screening test for Diabetes Mellitus during an annual exam?

Review the following blood gas results, then select the statement that BEST describes the results. Test Patient Results Reference Ranges pH 7.54 7.35 – 7.45 PCO2 43 mm Hg 35 – 45 mm Hg PO2 95 mm Hg 80 – 105 mm Hg HCO3- 50 mmol/L 18 – 29 mmol/L

Pre-hepatic jaundice is characterized by:

Which of the following lipid measurements does NOT require a fasting blood sample for accurate results?

A deficiency of B3/niacin can result in a disease called: