1. INSERM U482, Signal Transduction and Cellular Functions in Diabetes and Digestive Cancers Hôpital Saint‐Antoine 75571 Paris Cedex 12 France
2. The Laboratory of Experimental Cancerology Ghent University Hospital B‐9000 Ghent Belgium
3. Department of Pathology University of Newcastle Newcastle upon Tyne NE1 4LP UK
4. Novo Nordisk Bagsvaerd DK‐2880 Denmark