1. Center for Vaccine Development, Department of Medicine, University of Maryland School of Medicine, Baltimore,1 and
2. University of Maryland, College Park, University Health Center, College Park,2 Maryland; and
3. Peptide Therapeutics Group plc, Cambridge,3
4. Evans Medical Limited, Liverpool,4 and
5. Medeva Group Research5 and
6. Imperial College of Science, Technology, and Medicine,6 London, England