1. Center for Alzheimer's Disease and Related Disorders, Southern Illinois University School of Medicine, Carbondale, IL, USA
2. Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL, USA
3. Department of Anatomy, Southern Illinois University School of Medicine, Carbondale, IL, USA
4. Department of Neurology and Medical Microbiology, Immunology and Cell Biology, Southern Illinois University School of Medicine, Carbondale, IL, USA