Error in Text. In the Observation by Richmond et al titled “Nephrogenic Systemic Fibrosis: Relationship to Gadolinium and Response to Photopheresis,” published in the August issue of the Archives (2007;143[8]:1025-1030), in the second full paragraph in the first column on page 1029, “gadopentetate dimeglumine” was incorrectly listed in place of “gadopentetate ion.” The sentence should have read as follows: “It is possible that either free gadopentetate ion or the chelate itself could bind to endogenous ions in the tissues.30”