1. Cleo Roberts Center; Banner Sun Health Research Institute; Sun City Arizona USA
2. Civin Laboratory for Neuropathology; Banner Sun Health Research Institute; Sun City Arizona USA
3. Department of Biostatistics; Mayo Clinic; Scottsdale Arizona USA
4. Department of Neurology; Mayo Clinic; Scottsdale Arizona USA
5. University of Arizona College of Medicine-Phoenix Campus; Pheonix Arizona USA