1. Vanderbilt University Medical Center Nashville Tennessee USA
2. Geriatric Research, Education, and Clinical Center Tennessee Valley Healthcare System Nashville Tennessee USA
3. CDC COVID‐19 Response Team Centers for Disease Control and Prevention Atlanta Georgia USA
4. Wake Forest University Baptist Medical Center Winston‐Salem North Carolina USA
5. Beth Israel Deaconess Medical Center Boston Massachusetts USA
6. Hennepin County Medical Center Minneapolis Minnesota USA
7. Baystate Medical Center Springfield Massachusetts USA
8. UCLA Medical Center Los Angeles California USA
9. Oregon Health & Sciences University Portland Oregon USA
10. University of Washington Seattle Washington USA
11. Montefiore Medical Center The Bronx New York USA