1. Department of Cellular and Molecular Medicine , School of Medicine, , San Diego, CA , USA
2. University of California at San Diego , School of Medicine, , San Diego, CA , USA
3. Glycobiology Research and Training Center, University of California at San Diego , San Diego, CA , USA
4. College of Veterinary Medicine, Cornell University , Ithaca, NY , USA
5. Department of Chemistry, University of California at Davis , Davis, CA , USA
6. Department of Medicine, University of California , San Francisco, CA , USA
7. VA Medical Center , San Francisco, CA , USA