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S2
Pagana, Kathleen D. & Pagana, Timothy J. (2001). Mosby’s Diagnostic and Laboratory Test Reference 5th Edition: Mosby, Inc., Saint Louis, MO.

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Brown, T. (2004 January 27, Updated). T3 [12 paragraphs]. MedlinePlus Medical Encyclopedia [On-line information]. Available FTP: http://www.nlm.nih.gov/medlineplus/ency/article/003687.htm

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(© 2005). Triiodothyronine [2 paragraphs]. ARUP's Guide to Clinical Laboratory Testing [On-line information]. Available FTP: http://www.aruplab.com/guides/clt/tests/clt_259c.jsp#1149556

S5
Wu, A. (2006). Tietz Clinical Guide to Laboratory Tests, Fourth Edition. Saunders Elsevier, St. Louis, Missouri. Pp. 1076-1081.

S6
ARUP's Laboratory Test Directory: T3 Uptake. Available online: http://www.aruplab.com/guides/ug/tests/0070135.jsp

S7
Amarillo Medical Specialists: How to interpret your blood test results. Available online: http://www.amarillomed.com/howto.htm

S8
MedlinePlus Medical Encyclopedia: T3RU test. (Updated 10/24/07) Available online: http://www.nlm.nih.gov/medlineplus/ency/article/003688.htm