Dr. Shimon Sakaguchi was inadvertently excluded as an author on the article. His affiliations appear below.
Department of Experimental Pathology, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
Laboratory for Immunopathology, Institute of Physical and Chemical Research, Research Center for Allergy and Immunology, Yokohama 230-0045, Japan
The Rockefeller University Press
2005