1. Section of Endocrinology (J.B., G.A.I., T.U.), Rikshospitalet-Radiumhospitalet Medical Center, University of Oslo, N-0027 Oslo, Norway
2. Department of Surgery (S.J.), Sahlgrenska Hospital, S-416 85 Gothenburg, Sweden
3. Department of Endocrine Surgery (C.L.M.), Copenhagen University Hospital, DK-2100 Rigshospitalet, Denmark
4. Department of Surgery (J.N.), Karolinska University Hospital Solna, SE-171 76 Stockholm, Sweden
5. Department of Surgery (E.L.), Akademiska Hospital, SE-751 85 Uppsala, Sweden
6. Section of Endocrinology (O.T.), Department of Medicine, Södersjukhuset, SE-118 83 Stockholm, Sweden
7. Department of Surgery (J.-E.V.), Haukeland University Hospital and Institute of Medicine, University of Bergen, N-5021 Bergen, Norway
8. Department of Medicine (M.B.), St. Olav’s Hospital, University of Trondheim, 7006 Trondheim, Norway
9. Department of Endocrinology (S.A.), Haukeland University Hospital and Institute of Medicine, University of Bergen, N-5021 Bergen, Norway
10. Department of Endocrinology (C.F., T.R.), Sahlgrenska Hospital, S-416 85 Gothenburg, Sweden
11. Department of Metabolism and Endocrinology (B.F.), Karolinska University Hospital, SE-141 86 Huddinge, Sweden