1. Department of Biological Sciences University of South Carolina Columbia SC 29208 USA
2. Bioinformatics Group Immune Tolerance Network Bethesda MD 20814 USA
3. Whitehead Institute for Biomedical Research Massachusetts Institute of Technology Cambridge MA 02142 USA
4. Mass Spectrometry Center, Department of Chemistry & Biochemistry University of South Carolina Columbia SC 29208 USA
5. Burnett School of Biomedical Sciences, College of Medicine University of Central Florida Orlando FL 32828 USA