1. Health Science Research Associates, Apache Junction, AZ, USA
2. MetroWest Medical Center, Framingham, MA, USA
3. Health Science Research Associates, Tahoe City, CA, USA
4. Children’s Memorial Hospital, Chicago, IL, USA
5. NYU Langone Medical Center, New York City, NY, USA
6. University of Kentucky, Lexington, USA
7. Virginia Commonwealth University Medical Center, Richmond, USA
8. Children’s Hospital Los Angeles, CA, USA
9. Children’s Mercy Hospitals and Clinics, Kansas City, MO, USA
10. Stanford Hospital and Clinics, Palo Alto, CA, USA
11. Illinois Masonic Hospital, Chicago, USA