Correction

EVOLUTION. For the article “Recombination within natural populations of pathogenic bacteria: Short-term empirical estimates and long-term phylogenetic consequences” by Edward J. Feil, Edward C. Holmes, Debra E. Bessen, Man-Suen Chan, Nicholas P. J. Day, Mark C. Enright, Richard Goldstein, Derek W. Hood, Awdhesh Kalia, Catrin E. Moore, Jiaji Zhou, and Brian G. Spratt, which appeared in number 1, January 2, 2001, of Proc. Natl. Acad. Sci. USA (98, 182–187), the authors note the following correction. The heading in Table 1 “Δ-ln L of ML tree” should read “−ln L of ML tree.”