1. Department of Oncology; Section of Radiotherapy, Rigshospitalet, University of Copenhagen; Copenhagen Denmark
2. PET and Cyclotron Unit; Rigshospitalet, University of Copenhagen; Copenhagen Denmark
3. Division of Biostatistics and Bioinformatics; University of Maryland Greenebaum Cancer Center, and Department of Epidemiology and Public Health, University of Maryland School of Medicine; Baltimore Maryland