1. Department of Neurology, College of Medicine, Mayo Clinic, Rochester, MN, USA
2. Department of Radiology, College of Medicine, Mayo Clinic, Rochester, MN, USA
3. Department of Laboratory Medicine and Pathology College of Medicine, Mayo Clinic, Rochester, MN, USA
4. Department of Health Sciences Research, College of Medicine, Mayo Clinic, Rochester, MN, USA
5. Department of Neurology University Hospital of Gent, Belgium