In the article by R. W. Kozak et al., entitled “Nature of the bifunctional chelating agent used for radioimmunotherapy with Yttrium-90 monoclonal antibodies: critical factors in determining in vivo survival and organ toxicity,” which appeared in the May 15, 1989 issue of Cancer Research (pp. 2639–2644), one of the authors’ names was incorrectly spelled as Richard Junghaus. The correct spelling of the author’s name is Richard P. Junghans.