Serum TSH, T4, and thyroid antibodies in the United States population (1988 to 1994): National health and nutrition examination survey (NHANES III). - Hollowell,J.G.; Staehling,N.W.; Flanders,W.D.; Hannon,W.H.; Gunter,E.W. (J Clin Endocrinol Metab, 2002)