1. R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, Maryland.
2. C3O Medical Group, Ojai, California.
3. St. Joseph Mercy Health System, Ann Arbor, Michigan.
4. Lehigh Valley Health Network, Allentown, Pennsylvania.
5. Advanced ICU Care, St. Louis, Missouri.
6. Methodist Hospital, Clarian Health, Indianapolis, Indiana.