1. Alberta Glycomics Centre and Department of Chemistry, University of Alberta, Edmonton Alberta T6G 2G2, Canada
2. Department of Pharmaceutical Sciences, Pharmacenter, University of Basel, Klingelbergstrasse 50, CH-4056 Basel, Switzerland
3. Division of Medical Genetics, Sainte-Justine University Hospital Research Center, University of Montreal, Montréal, Quebec H3T 1C5, Canada