Correction

IMMUNOLOGY. For the article “Immunization of metastatic breast cancer patients with a fully synthetic globo H conjugate: A phase I trial,” by Teresa Gilewski, Govindaswami Ragupathi, Sonal Bhuta, Lawrence J. Williams, Cristina Musselli, Xu-Fang Zhang, Kalman P. Bencsath, Katherine S. Panageas, Jeanette Chin, Clifford A. Hudis, Larry Norton, Alan N. Houghton, Philip O. Livingston, and Samuel J. Danishefsky, which appeared in number 6, March 13, 2001, of Proc. Natl. Acad. Sci. USA (98, 3270–3275), the authors request that William G. Bornmann and Maria Spassova, both of the Preparative Synthesis Core Facility at the Sloan–Kettering Institute, be added to the list of authors between Xu-Fang Zhang and Kalman P. Bencsath.