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S1
Corbett, JV. Laboratory Tests & Diagnostic Procedures with Nursing Diagnoses, 4th ed. Stamford, Conn.: Appleton & Lang, 1996. pp. 34-35, 41-43.

S2
Frey, Rebecca J. Iron Tests. Chapter in: Gale Encyclopedia of Medicine, Edition One, 1999 Gale Research Group, p. 1648.

S3
Witte DL, Crosby WH, Edwards CQ, Fairbanks VG, Mitros FA: Practice guideline development task force of the College of American Pathologists.

S4
Boston University Medical Center: Community Outreach Health Information System. Available online: http://www.bu.edu/cohis/cardvasc/blood/anemia.htm#prevent

S5
Lyon, Elaine and Frank, Elizabeth L. Hereditary Hemochromatosis Since Discovery of the HFE Gene. Clinical Chemistry 47:1147-1156 (Jul 2001).

S6
Lisa Dunay, MHA, MT(ASCP). Manager of Educational Assessment and Accreditation, American Association for Clinical Chemistry, Washington, DC

S7
Clinical Guide to Laboratory Tests. 3rd ed. Tietz NW, ed. Philadelphia: W.B. Saunders & Co.; 1995.