1. Immunology Program, Sloan-Kettering Institute for Cancer Research, New York, New York.
2. Laboratoire de Bioenergique et Ingenierie des proteines, Centre Nationale de la Recherche, Marseille, France.
3. Department of Biochemistry, Albert Einstein College of Medicine of Yeshiva University, Bronx, New York.
4. Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan.
5. Department of Neurology and Neurobiology, Weill-Cornell Medical College, New York, New York.