1. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
2. International Diabetic Neuropathy Consortium (IDNC), Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
3. Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
4. Danish Pain Research Center, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
5. Department of Neurology, Aarhus University Hospital, Aarhus, Denmark
6. Danish Center for Strategic Research in Type 2 Diabetes, Steno Diabetes Center Odense, Odense, Denmark
7. Department of Neurology, University of Michigan, Ann Arbor, MI