1. Canandaigua Veterans Affairs Medical Center, Canandaigua, NY, USA
2. New York Chiropractic College, Seneca Falls, NY, USA
3. University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
4. State University of New York College at Buffalo, Buffalo, NY, USA
5. VA Western New York Healthcare System, Buffalo, NY, USA
6. University of Toronto, Toronto, Canada
7. Baycrest Geriatric Centre, Toronto, Canada