Your blood serves ... to your test result and a reference range or interval. This range is essentially the upper and lower ...

Doctors use a serum iron blood ... test and other related tests may reveal low or high values. Normal ranges can vary, so it is essential for a person to speak to their doctor about what their ...

I brought his chart ... "reference ranges" you see on the reports may vary slightly from lab to lab, depending on which of several possible methods a lab chooses to use. Test results can also ...