1. Johns Hopkins Bloomberg School of Public Health; Baltimore MD USA
2. University of British Columbia; Vancouver BC Canada
3. New York University; New York NY USA
4. University of California; Los Angeles (UCLA); Los Angeles CA USA
5. University of Verona; Verona Italy
6. Duke University School of Medicine; Durham NC USA
7. Icahn School of Medicine at Mount Sinai; New York NY USA
8. George Washington University; Washington DC USA