1. Stanford University School of Medicine; Palo Alto California
2. Stanford University Medical Center; Palo Alto California
3. Salford Royal Hospital; Salford UK
4. University of Warwick; Coventry UK
5. University of Texas; Houston
6. Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano; Milan Italy
7. University of Connecticut School of Medicine; Storrs
8. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán; Mexico City Mexico
9. Royal Free Hospital; London UK
10. University of Montreal, Montreal; Quebec Canada
11. University of Manchester and Manchester Academic Health Science Centre, Manchester, and Salford Royal Hospital; Salford UK
12. Jewish General Hospital, McGill University, Montreal; Quebec Canada