1. Department of Pathology and Laboratory Medicine Emory University School of Medicine, Room 141 Whitehead Building, 615 Michael Street, Atlanta, Georgia 30322, United States
2. School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, NW, Atlanta, Georgia 30332-0400, United States
3. Centers for Disease Control and Prevention, 4770 Buford Highway, Atlanta, Georgia 30341, United States
4. Department of Pathology and Lab Medicine, Harvard Medical School and Children's Hospital Boston, 10214 Karp Research Building, 1 Blackfan Circle, Boston, Massachusetts 02115, United States