1. Northwestern University Feinberg School of Medicine; Chicago Illinois
2. University of Alabama at Birmingham
3. Columbia University; New York New York
4. Washington University School of Medicine; St. Louis Missouri
5. University of Michigan School of Medicine; Ann Arbor
6. Mayo Clinic College of Medicine and Science; Rochester Minnesota
7. University of Birmingham Research Laboratories; Queen Elizabeth Hospital Birmingham; Birmingham UK
8. William Harvey Research Institute and Barts and The London School of Medicine and Dentistry; Queen Mary University of London; London UK