1. Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21231, United States
2. Department of Pathology, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Antibody Characterization Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21701, United States
4. Office of Cancer Clinical Proteomics Research, National Cancer Institute, Bethesda, Maryland 20892, United States
5. Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109, United States