Acknowledgements
We appreciate advice and assistance from Jeffrey Esko, including assistance with Ndst1f/f LysMCre+ mutants, and we acknowledge Paul Goetinck for Sdc4 homozygous-null mice. We thank Paul Clopton of the VA San Diego Healthcare System for statistical assistance and Faye Nourollahi for assistance with some unique culture and genotyping procedures as well as PCR studies.