1. C.M. is at the Laboratory of Viral Immunobiology and the Christopher H. Browne Center for Immunology and Immune Diseases, The Rockefeller University, New York, NY 10021.
2. R.M.S. is at the Laboratory of Cellular Physiology and Immunology and the Christopher H. Browne Center for Immunology and Immune Diseases, The Rockefeller University, New York, NY 10021.
3. S.-i.F. is at the Research Unit for Cellular Immunotherapy, Research Center for Allergy and Immunology (RCAI), RIKEN YOKOHAMA, Yokohama City, Kanagawa, 230-0045, Japan.