References
http://www.dotpharmacy.co.uk/upthy.html
http://www.thyroidmanager.org/Chapter3/3d-text.htm
http://www.teaching-biomed.man.ac.uk/cattell
http://www.cafamily.org.uk/Direct/t19.html
http://courses.stlcop.edu/pathophysiology/Thyroid
http://www.neurosci.pharm.utoledo.edu/MBC3320/thyroid.htm
http://arbl.cvmbs.colostate.edu/hbooks/pathphys/endocrine/thyroid
http://endocrineweb.com/thyfunction.html
http://www.the-thyroid-society.org/faq/01.html
http://print.infoplease.com/ce6/sci/A0848667.html
http://www-medlib.med.utah.edu/WebPath/ENDOHTML
http://www.chem.qmul.ac.uk/iupac/AminoAcid/AAap.html
http://www.waichung.demon.co.uk/webanim/T4Web.htm