1. Division
of Nuclear Medicine, Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
2. Discovery
Chemistry Platforms, PET Radiochemical Synthesis, Bristol-Myers Squibb Research and Development, Princeton, New Jersey 08648, United States
3. The
Interdepartmental Program in Medicinal Chemistry, The University of Michigan, Ann
Arbor, Michigan 48109, United States