MEDICAL SCIENCES. For the article “HLTF gene silencing in human colon cancer,” by Helen R. Moinova, Wei-Dong-Chen, Lanlan Shen, Dominic Smiraglia, Joseph Olechnowicz, Lakshmeswari Ravi, Lakshmi Kasturi, Lois Myeroff, Christoph Plass, Ramon Parsons, John Minna, James K. V. Willson, Sylvan B. Green, Jean-Pierre Issa, and Sanford D. Markowitz, which appeared in number 7, April 2, 2002, of Proc. Natl. Acad. Sci. USA (99, 4562–4567; First Published March 19, 2002; 10.1073/pnas.062459899), the author name “Wei-Dong-Chen” appeared incorrectly due to a printer's error. The correct name is “Wei-Dong Chen.” The online version has been corrected.