1. Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT, USA
2. Department of Chemistry, 55 N. Eagleville Rd., University of Connecticut, Storrs, CT, USA
3. West Campus Analytical Core, Yale University, West Haven, CT, USA
4. Department of Molecular Biophysics and Biochemistry, Yale-Keck MS and Proteomics Resource, Yale University, New Haven, CT, USA
5. Metastagen, Inc., Wilmington, DE, USA