1. Department
of Chemistry and Biochemistry, University of Notre Dame, 236 Nieuwland
Science Hall, Notre Dame, Indiana 46556, United States
2. Freimann
Life Science Center, University of Notre Dame, 400 Galvin Life
Science, Notre Dame, Indiana 46556, United States
3. Division
of Nuclear Medicine, Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655, United States