1. Clinical Epidemiology Division, Department of Medicine, Solna, Karolinska Institutet , Maria Aspmans Gata 16, 17176 Stockholm , Sweden
2. Department of Epidemiology Research, Statens Serum Institut , Artillerivej 5, 2300 Copenhagen , Denmark
3. Department of Medicine, Sahlgrenska University Hospital , Blå stråket 5, 413 45 Gothenburg , Sweden
4. The Swedish National Diabetes Register, Center of Registers , Medicinaregatan 18 G, 413 45 Gothenburg , Sweden
5. Department of Global Health and Population, Harvard TH Chan School of Public Health , 665 Huntington Avenue, Boston, MA 02115 , USA