1. Baystate Medical Center; Tufts University School of Medicine; Springfield Massachusetts
2. Imperial Colleges; London United Kingdom
3. Stanford University Medical Center; Stanford California
4. Northwell Health, North Shore University Hospital; Manhasset New York
5. Long Beach Veterans Administration Hospital; University of California, Irvine; Irvine California
6. Advocate Illinois Masonic Medical Center, Rush Medical College; Chicago Illinois