1. Turku PET Centre (H.H., J.C.H., M.T., H.K., V.S., K.M., V.O., M.H.-S., A.R., R.P., P.N.), University of Turku, Turku 20520, Finland;
2. Division of Digestive Surgery and Urology (P.S.), Turku 20520, Finland;
3. Department of Endocrinology (P.N., M.S.), Turku University Hospital, Turku 20520, Finland;
4. Faculty of Medicine (N.K.), University of Kagawa, Kagawa 760-0016, Japan;
5. Department of Radiology (R.P.), University of Tampere, Tampere 33014, Finland;
6. Institute of Biomedical Engineering (P.I.), National Research Council, 35128 Padua, Italy;
7. Institute of Clinical Physiology (P.I.), National Research Council, 56124 Pisa, Italy