[1] Advion Inc, R&D, Ithaca, NY USA
[2] Massachusetts Gen Hosp, Div Nucl Med & Mol Imaging, Gordon Ctr Med Imaging, Boston, MA 02114 USA
[3] Harvard Med Sch, Dept Radiol, Boston, MA 02115 USA
[4] Katholieke Univ Leuven, Dept Pharmaceut & Pharmacol Sci, Lab Radiopharm, Leuven, Belgium
[5] Univ Hosp UZ Leuven, Dept Nucl Med, Radiopharm, Leuven, Belgium
[6] Merck & Co Inc, Merck Res Labs, West Point, NY USA