1. Biomedical Sciences Research Complex, University of St. Andrews, KY16 9ST, U.K.
2. Institute for Glycomics, Griffith University Gold Coast Campus, Queensland 4222, Australia
3. Department of Infection, Immunity and Inflammation, University of Leicester, LE1 9HN, U.K.
4. Dipartimento di Biologia Molecolare, Universita di Siena, 53100, Italy