1. MRC-Arthritis Research UK Centre for Integrated Research into Musculoskeletal Ageing, Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom.
2. Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan.
3. Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center and Oklahoma City VA Medical Center, Oklahoma City, Oklahoma.
4. Oklahoma VA Medical Center, Oklahoma City, Oklahoma.
5. Free Radical Biology and Aging Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma.