On page 195 of the March 2001 issue, the commentary entitled “Genomics and human life span—what's left to extend?” by Richard C. Strohman contained mistakes in the reference citations and reference list. Reference numbering in the text was incorrect and references 2 and 4 should not have been present in the list. A corrected form of the article can be found at http://www.nature.com/nbt/journal/v19/n6/index.html.