[1] Rigshosp, Radiat Med Res Ctr, Dept Radiat Oncol, Finsen Ctr, Copenhagen, Denmark
[2] Rigshosp, Dept Clin Physiol Nucl Med & PET, Copenhagen, Denmark
[3] Cluster Mol Imaging, Copenhagen, Denmark
[4] Univ Maryland, Sch Med, Div Biostat & Bioinformat, Baltimore, MD 21201 USA