1 Department of Medicine, Division of Endocrinology and Metabolism, University of California, San Diego, La Jolla, CA, USA; Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA, USA. Electronic address: pgordts@ucsd.edu.
2 Glycobiology Research and Training Center, University of California, San Diego, La Jolla, CA, USA; Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA. Electronic address: jesko@ucsd.edu.