1. Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA
2. Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA
3. Department of Radiology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
4. Department of Nuclear Medicine, Odense University Hospital, DK-5000 Odense, Denmark
5. Research Unit of Clinical Physiology and Nuclear Medicine, Department of Clinical Research, University of Southern Denmark, DK-5000 Odense, Denmark
6. The Intervention Centre, Division of Technology and Innovation, Oslo University Hospital, NO-0316 Oslo, Norway
7. Institute of Clinical Medicine, University of Oslo, NO-0316 Oslo, Norway