1. University of Utah, Salt Lake City, UT, USA
2. Brigham and Women’s Hospital, Boston, MA, USA
3. Harvard Medical School, Boston, MA, USA
4. Meharry Medical College, Nashville, TN, USA
5. Vanderbilt University Medical Center, Nashville, TN, USA
6. Weill Cornell Medical College, New York–Presbyterian Hospital, New York, NY, USA
7. Massachusetts Eye and Ear Infirmary, Boston, MA, USA