1. Mass Spectrometry Data Center, National Institute of Standards & Technology, 100 Bureau Drive Stop 8362, 20899, Gaithersburg, MD, USA
2. Agilent Technologies, Inc., 2500 Regency Parkway, 27518, Cary, NC, USA
3. Complex Carbohydrate Research Center and Department of Biochemistry and Molecular Biology, University of Georgia, 315 Riverbend Road, 30602, Athens, GA, USA