In the Special Article by Ladenson et al titled "American Thyroid Association Guidelines for Detection of Thyroid Dysfunction" published in the June 12 issue of the ARCHIVES (2000;160:1573-1575), an error occurred in the byline and in the affiliation footnote on page 1573. Harvey D. Cohen, MD, should have been added to the author byline, and Harvey D. Cohen, MD, Rancho Cuchamonga, Calif, should have been added to the affiliation footnote.