1. University of North Carolina School of Medicine; Chapel Hill NC USA
2. Duke University Medical Center; Durham NC USA
3. The EMMES Corporation; Rockville MD USA
4. University of Arkansas for Medical Sciences and Arkansas Children's Hospital; Little Rock AR USA
5. Johns Hopkins University School of Medicine; Baltimore MD USA
6. Icahn School of Medicine at Mt. Sinai; New York NY USA
7. National Jewish Health; Denver CO USA