[1] Edward Mallinckrodt Inst Radiol, Div Nucl Med, St Louis, MO 63110 USA
[2] Washington Univ, Sch Med, Siteman Canc Ctr, St Louis, MO USA
[3] City Hope Comprehens Canc Ctr, Div Med Oncol & Expt Therapeut, Duarte, CA USA
[4] Washington Univ, Sch Med, Div Biostat, St Louis, MO 63110 USA
[5] Washington Univ, Sch Med, Dept Med, St Louis, MO 63110 USA
[6] Univ Illinois, Dept Chem, Urbana, IL 61801 USA
[7] Edward Mallinckrodt Inst Radiol, Div Radiol Sci, St Louis, MO 63110 USA