1. Howard Hughes Medical Institute, Departments of Internal Medicine and Physiology and Biophysics, University of Iowa College of Medicine, Iowa City, Iowa 52242
2. Genzyme Corporation, One Mountain Road, Framingham, Massachusetts 01701
3. Department of Intemal Medicine
4. Howard Hughes Medical Institute
5. Department of Otolaryngology
6. Molecular Biology
7. Cell Physiology
8. Medical Affairs