1. Department of Chemistry Hunter College of the City University of New York New York New York 10065 USA
2. Department of Chemistry Graduate Center of the City University of New York New York New York 10016 USA
3. Department of Chemistry and Physics Franklin College Franklin Indiana 46131 USA
4. Department of Radiology Memorial Sloan Kettering Cancer Center New York New York 10065 USA
5. Department of Natural Sciences LaGuardia Community College of the City University of New York New York New York 11101 USA
6. Institute for Cancer Research and Education SUNY Old Westbury Old Westbury New York 11568 USA
7. Department of Imaging and Radiology Dana-Farber Cancer Institute Boston Massachusetts 02215 USA