1. University of Colorado–Anschutz Medical Campus, School of Medicine, Aurora, Colorado, USA
2. Department of Medicine, Division of Geriatrics, University of California–San Francisco, San Francisco, California, USA
3. Department of Medicine, Division of Geriatrics and Palliative Medicine, Weill Cornell Medical College, New York, New York, USA
4. Department of Medicine, Metabolism Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
5. Department of Medicine, Division of Infectious Disease, University of Maryland School of Medicine, Baltimore, Maryland, USA
6. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
7. Department of Global Health and Infection, Brighton and Sussex Medical School, Brighton, United Kingdom
8. Department of HIV Medicine, Division of Geriatric Medicine, Chelsea and Westminster Hospital, London, United Kingdom
9. McGill University Health Center, Montreal, Canada
10. Department of Medicine, University of Colorado–Anschutz Medical Campus, Aurora, Colorado, USA