1. German Center for Neurodegenerative Diseases (DZNE) Rostock/Greifswald, Greifswald, Germany
2. Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
3. Division of Geriatrics, Department of Medicine, University of Wisconsin-Madison School of Medicine & Public Health, Madison, WI, USA
4. William S. Middleton Memorial Veterans Hospital, Geriatric Research Education and Clinical Center, Madison, WI, USA
5. University of Wisconsin-Madison School of Nursing, Madison, WI, USA
6. Department of Psychology, University of Southern California, Los Angeles, CA, USA