1. Department of Medicine, Sahlgrenska University Hospital , Blå Stråket 5, 413 45 Gothenburg , Sweden
2. National Diabetes Register, Centre of Registers , Gothenburg , Sweden
3. Novo Nordisk Scandinavia AB , Malmö , Sweden
4. Novo Nordisk A/S , Søborg , Denmark
5. Department of Medical Sciences, Cardiology, Uppsala University , Uppsala , Sweden