1. Institute of Medical Science, University of Tokyo, Tokyo, 108-8639, Japan
2. Atopy (Allergy) Research Center, Juntendo University School of Medicine, Tokyo, 113-8421, Japan
3. Department of Hematology-Oncology Cornell University Medical College, New York, NY 10021
4. ImClone Systems, New York, NY 10014
5. Department of Anatomy, University of California, San Francisco, CA 94143