1. Department of Cell and Regenerative Biology, University of Wisconsin−Madison, Madison, Wisconsin 53705, United States
2. Human Proteomics Program, School of Medicine and Public Health, University of Wisconsin−Madison, Madison, Wisconsin 53705, United States
3. Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, University of Wisconsin−Madison, Madison, Wisconsin 53705, United States
4. Research Service, William S. Middleton Memorial Veterans Hospital, Madison, Wisconsin 53705, United States
5. Department of Chemistry, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
6. Bruker Daltonics Inc., Billerica, Massachusetts 01821, United States
7. Bruker Daltonik GmbH, Bremen 28359, Germany
8. Department of Pediatrics, University of Wisconsin−Madison, Madison, Wisconsin 53792, United States
9. Institute for Clinical and Translational Research, University of Wisconsin−Madison, Madison, Wisconsin 53705, United States