1. University of Kansas Hospital, Kansas City, KS, USA
2. Washington University, Barnes-Jewish Hospital, St Louis, MO, USA
3. Christiana Care Health System, Newark, DE, USA
4. St. Joseph Mercy Hospital, Ann Arbor, MI, USA
5. Henry Ford Hospital–Wyandotte, Wyandotte, MI, USA
6. California Pacific Medical Center, San Francisco, CA, USA
7. St Cloud Hospital, St. Cloud, MN, USA
8. Porter Hospital, Valparaiso, IN, USA
9. University Medical Center at Brackenridge, Austin, TX, USA
10. Northwest Community Hospital, Arlington Heights, IL, USA
11. Henry Ford Hospital, Main Campus, Detroit, MI, USA