1. Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, USA
2. Department of Radiology, University of Wisconsin School of Medicine and Public Health, Madison, USA
3. Clinic of Radiology and Nuclear Medicine, Basel University Hospital, Basel, Switzerland
4. Alzheimer’s Disease Research Center, University of Wisconsin School of Medicine and Public Health, Madison, USA
5. Geriatric Research Education and Clinical Center, Wm. S. Middleton Memorial VA Hospital, Madison, USA
6. Wisconsin Alzheimer’s Institute, University of Wisconsin School of Medicine and Public Health, Madison, USA