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S2
Laboratory Tests & Diagnostic Procedures with Nursing Diagnoses (4th edition), Corbett, JV. Stamford, Conn.: Appleton & Lang, 1996. pp. 727-728.

S3
Robert Harr, M.S. MT(ASCP). Associate Professor and Chair, Department of Public and Allied Health; Program Director, Medical Technology, Bowling Green State University.

S4
Larry J. Kricka, PhD. American Association for Clinical Chemistry, President. University of Pennsylvania Medical Center, Philadelphia, PA.