1. University of Groningen, University Medical Center Groningen, Medical Imaging Center, Department of Nuclear Medicine and Molecular Imaging, 9713 GZ Groningen, The Netherlands
2. Hospital Group Twente, Department of Rheumatology and Clinical Immunology, 7600 SZ Almelo, The Netherlands
3. University of Groningen, University Medical Center Groningen, Department of Rheumatology and Clinical Immunology, 9713 GZ Groningen, The Netherlands
4. Medical University of Warsaw, 02-091 Warsaw, Poland
5. Hospital Group Twente, Department of Nuclear Medicine, 7555 DL Hengelo, The Netherlands
6. University of Twente, Faculty of Science and Technology, Department of Biomedical Photonic Imaging, 7522 NB Enschede, The Netherlands