1. Department of Chemistry, University of Wisconsin - Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
2. Department of Cell and Regenerative Biology, University of Wisconsin - Madison, 1111 Highland Avenue., Madison, Wisconsin 53705, United States
3. Human Proteomics Program, School of Medicine and Public Health, University of Wisconsin, 1111 Highland Avenue., Madison, Wisconsin 53705, United States
4. Analytical R&D, AbbVie Inc., 1 Waukegan Rd, North Chicago, Illinois 60064, United States