1. Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
2. The UKK Institute for Health Promotion Research, Tampere, Finland
3. Department of Biostatistics, University of Turku, Turku, Finland
4. Institute of Biomedicine, University of Turku, Turku, Finland
5. Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
6. Rydberg Laboratory of Applied Sciences, University of Halmstad, Halmstad, Sweden