Correction

MEDICAL SCIENCES. For the article “Impaired neural tube closure, axial skeleton malformations, and tracheal ring disruption in TRAF4-deficient mice,” by Catherine H. Régnier, Régis Masson, Valérie Kedinger, Julien Textoris, Isabelle Stoll, Marie-Pierre Chenard, Andrée Dierich, Catherine Tomasetto, and Marie-Christine Rio, which appeared in number 8, April 16, 2002, of Proc. Natl. Acad. Sci. USA (99, 5585–5590; First Published April 9, 2002; 10.1073/pnas.052124799), the affiliation of the communicating member appeared incorrectly due to a printer's error. The corrected communicated line appears below.