1. Department of Chemical Biology and Drug Discovery Utrecht Institute for Pharmaceutical Sciences Bijvoet Center for Biomolecular Research Utrecht University Universiteitsweg 99 3584 CG Utrecht Netherlands
2. Complex Carbohydrate Research Center University of Georgia 315 Riverbend Road Athens GA 30602 USA
3. Molecular Recognition and Host-Pathogen Interactions CIC bioGUNE Bizkaia Technology Park, Building 800 48162 Derio Bizkaia Spain
4. Basque Foundation for Science Ikerbasque 48013 Bilbao Bizkaia Spain
5. Department of Organic Chemistry II UPV/EHU University of the Basque Country 48940 Leioa Bizkaia Spain
6. Department of Chemistry University of Georgia Athens GA 30602 USA