A(n) ________ requires the patient's permission to disclose PHI

The heart sound produced by the closing of the aortic and pulmonary valves is:

A) S4. B) S2. C) S3. D) S1.

Which laboratory test would be most helpful in differentiating iron-deficiency anemia from anemia of chronic disease?

a. Hemoglobin b. Serum iron c. Percent transferrin saturation d. Serum transferrin receptor