1. Research Centre for Endocrinology and Metabolism (C.O., B-Å.B., O.I., M.S.), Sahlgrenska University Hospital, S-41345 Göteborg, Sweden;
2. Diabetes Branch (C.O.), The National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland;
3. Department of Connective Tissue Biology (T.T.A.), Institute of Anatomy, University of Aarhus, Aarhus, Denmark;
4. Eli Lilly, Netherlands (M.S.), Nieuwegein, Netherlands