Serum thyrotropin, thyroxine, and thyroid antibodies in the United States population (1988 to 1994): NHANES III. - Hollowell,J.G.; Staehling,N.W.; Hannon,W.H.; Flanders,W.D.; Gunter,E.W.; Spencer,C.A.; Braverman,L.E. (J Clin Endocrinol Metab, 2002)