Nature Med. 8, 825–830 (2002).

Bharat Lagu was omitted from the list of authors. The correct list is below.

B. Borowsky, M.M. Durkin, K. Ogozalek, M.R. Marzabadi, J. DeLeon, B. Lagu, R. Heurich, H. Lichtblau, Z. Shaposhnik, I. Daniewska, T.P. Blackburn, T.A. Branchek, C. Gerald, P.J. Vaysse & C. Forray

Authors regret these errors.