From The John Hopkins University School of Medicine, Baltimore, Md (Dr Ladenson); University of
Southern California, Los Angeles (Dr Singer); University of Kentucky, Lexington (Dr Ain); Maine Medical
Center, Bangor (Dr Bigos); University of Miami, Miami, Fla (Dr Levy); Mayo Clinic, Rochester, Minn (Dr
Smith); and Massachusetts General Hospital and Harvard Medical School, Boston, Mass (Dr Daniels).
The American Thyroid Association is located in Falls Church, VA (Web address: http://www.thyroid.org/).

Corresponding author: Paul W. Ladenson, Division of Endocrinology and Metabolism, The Johns Hopkins
University School of Medicine, 1830 E Monument St, Suite 333, Baltimore, MD 21287-0003 (e-mail: ladenson@jhmi.edu).