1. Turku PET Centre; University of Turku; Turku Finland
2. Department of Psychology; University of Turku; Turku Finland
3. Department of Endocrinology; Turku University Hospital; Turku Finland
4. Department of Digestive Surgery and Urology; Turku University Hospital; Turku Finland
5. Institute of Clinical Physiology, National Research Council (CNR); Pisa Italy