1. Duke University Medical Center, Durham, NC, USA
2. INSERM, Paris, France
3. Milpark Hospital, Johannesburg, South Africa
4. Baystate Medical Center, Springfield, MA, USA
5. Lady Davis Carmel Medical Center, Haifa, Israel
6. University of Alberta, Edmonton, Alberta, Canada
7. University of Leuven, Leuven, Belgium
8. Stanford University, Stanford, CA, USA