1. Robert Robinson Laboratories, Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
2. Department of Biochemistry, Institute of Glycobiology, University of Oxford, South Parks Road, Oxford, OX1 3QU, U.K.
3. Department of Pharmacology and Therapeutics, University of Liverpool, Liverpool, U.K.
4. Department of Microbiology and Immunology, Georgetown University Medical Center, 3900 Reservoir Road, NW, Washington, D.C. 20057, United States
5. The Romark Institute for Medical Research, 3000 Bayport Drive, Suite 200, Tampa, Florida 33607, United States