1. The Department of Molecular and Cellular Physiology (X.M., Y.Z., A.S., J.V., P.R., L.E.), Diabetes Research Unit, Institute of Physiological Sciences, BMC B11, SE-221 84 Lund, Sweden
2. Lilly Research Laboratories (J.G., S.S.), Essener Strasse 93, D-22419 Hamburg, Germany
3. The Rolf Luft Center for Diabetes Research (P.-O.B.), Department of Molecular Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden
4. Bartholin Instituttet, Kommunehospitalet (K.B.), DK-1399 Copenhagen K, Denmark
5. The Oxford Centre for Diabetes (P.R.), Endocrinology and Metabolism, Churchill Hospital, Headington, Oxford OX3 7LJ, United Kingdom