1. Dalhousie University Halifax Nova Scotia Canada
2. Jewish General HospitalMcGill University Montreal Quebec Canada
3. Vanderbilt University Medical Center Nashville Tennessee
4. University of Utah Salt Lake City
5. Northwestern University Feinberg School of Medicine Chicago Illinois
6. University of Lille and Hôpital Claude Huriez Lille France
7. McGill University and Lady Davis Institute Montreal Quebec Canada
8. Toronto Western Hospital, Mount Sinai Hospital and University of Toronto Toronto Ontario Canada
9. University of Michigan Ann Arbor
10. Cochin HospitalParis‐Descartes University Paris France
11. University of Melbourne at St. Vincent's Hospital Melbourne Victoria Australia
12. Royal Adelaide Hospital and University of Adelaide Adelaide South Australia Australia
13. Georgetown University Washington DC
14. Royal Free Hospital London UK
15. Jewish General Hospital, McGill University and Lady Davis Institute Montreal Quebec Canada