1. Laboratory of Experimental Medicine (F.O., A.K.C., D.C., D.L.E.), Université Libre de Bruxelles, 1070 Brussels, Belgium;
2. Laboratory for β-Cell Biology (J.S., T.M.-P.), Steno Diabetes Center, DK-2820 Gentofte, Denmark;
3. Department of Molecular Medicine (T.M.-P.), Karolinska Institute, SE-17177 Stockholm, Sweden