1. Veterans Affairs Medical Center; Washington DC USA
2. Georgetown University/MedStar Washington Hospital Center; Washington DC USA
3. University of California; Los Angeles CA USA
4. Stony Brook University; Stony Brook NY USA
5. Brigham and Women's Hospital Heart and Vascular Center; Boston MA USA
6. Attikon University Hospital; Athens Greece
7. University of California; San Francisco, Fresno CA USA
8. University of Pittsburgh and VA Pittsburgh Healthcare System; Pittsburgh PA USA
9. Université de Montréal; Montreal Canada
10. Georgetown University; Washington DC USA
11. George Washington University; Washington DC USA
12. St Paul General Hospital; Thessaloniki Greece
13. Hippocration Hospital; Thessaloniki Greece
14. University of Alabama at Birmingham; Birmingham AL USA
15. University of California; San Francisco CA USA
16. Westchester Medical Center and New York Medical College; Valhalla NY USA
17. Department of Veterans Affairs; Geriatrics and Extended Care; Washington DC USA
18. Division of Cardiology and Metabolism - Heart Failure, Cachexia and Sarcopenia, Department of Cardiology (CVK); and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK) Berlin; Charité Universitätsmedizin Berlin; Germany
19. Department of Cardiology and Pneumology; University Medicine Göttingen; Germany
20. University of Michigan; Ann Arbor MI USA