1. National Centre for Register-Based Research, Department of Economics and Business Economics, Aarhus University, Aarhus, Denmark
2. Centre for Integrated Register-Based Research, Centre for Integrated Register-Based Research, Aarhus University, Aarhus University, Aarhus, Denmark
3. Department of Clinical Epidemiology, Aarhus University, Aarhus, Denmark
4. Department of Neurology, Aarhus University Hospital, Aarhus, Denmark