1. Department
of Radiation Physics, Gothenburg University, Gula Stråket 2B, 41345 Gothenburg, Sweden
2. Department
of Oncology, Gothenburg University, 41345 Gothenburg, Sweden
3. PET
and Cyclotron Unit, KF3982, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark
4. Department
of Applied Physics, Chalmers University of Technology, 41296, Gothenburg, Sweden