1. Copenhagen Center for Glycomics, University of Copenhagen, Copenhagen 2200, Denmark
2. Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden 2333, ZA, The Netherlands
3. Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602, United States
4. Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen 2200, Denmark