1. The Research Institute of the McGill University Health Centre and Departments of Medicine, Biochemistry and Pharmacology & Therapeutics (M.B.R., A.S.M., L.I., G.R., S.J., J.F., V.P.), McGill University, Montreal, Quebec H3G 1A4, Canada
2. Laboratory of Proteomics and Analytical Technologies (X.Y., J.B., T.V.), SAIC-Frederick, Inc., National Cancer Institute, Frederick, Maryland 21702