1. University of Washington School of Medicine, Seattle, WA, USA
2. University of Johannesburg, Auckland Park, South Africa
3. Chinese University of Hong Kong, Hong Kong, China
4. University of Montreal, Montreal, Canada
5. Harvard Medical School, Boston, MA, USA
6. Hamad Bin Khalifa University, Doha, Qatar
7. Simon Fraser University, Burnaby, Canada
8. University of Oxford, Oxford, England
9. University of Ghana, Legon, Ghana