1. Obesity Research Unit (E.R., S.J., S.K., S.H., A.R., K.H.P.), Research Programs Unit, University of Helsinki, 00014 Helsinki, Finland
2. Research Program for Molecular Neurology (R.R.-T., E.P.), University of Helsinki, 00014 Helsinki, Finland
3. Helsinki Medical Imaging Center (A.H., J.L., N.L.), Radiology, University of Helsinki, 00290 Helsinki, Finland
4. Institute for Clinical Diabetology (J.L.), German Diabetes Center, Leibniz Center for Diabetes Research, Heinrich Heine University, 40225 Düsseldorf, Germany
5. Turku Positron Emission Tomography Center (V.S., K.A.V.), Turku University Hospital and University of Turku, 20521 Turku, Finland
6. Institute for Molecular Medicine Finland (K.H.P.), Institute for Molecular Medicine Finland, University of Helsinki, 00014 Helsinki, Finland
7. Endocrinology (K.H.P.), Abdominal Center, Helsinki University Hospital, University of Helsinki, 00014 Helsinki, Finland