1. Garrison Institute on Aging, Texas Tech University Health Sciences Center, Lubbock, TX, USA
2. Internal Medicine Department, Texas Tech University Health Sciences Center, Lubbock, TX, USA
3. Garrison Institute on Aging, South West Campus, Texas Tech University Health Sciences Center, Lubbock, TX, USA
4. Pharmacology & Neuroscience Department, Texas Tech University Health Sciences Center, Lubbock, TX, USA
5. Neurology Department, Texas Tech University Health Sciences Center, Lubbock, TX, USA