1. Division of Immunity and Pathogenesis, College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, 6900 Lake Nona Blvd., Orlando, Florida 32827, United States
2. Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
3. Department of Chemistry, Mass Spectrometry Facility, The Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, United States
4. Chemistry Department, United States Naval Academy, 572M Holloway Road, Annapolis, Maryland 21402, United States