1. University of California-Davis, Sacramento, California
2. University of Texas Southwestern, Dallas, Texas
3. University of Texas M. D. Anderson Cancer Center, Houston, Texas
4. University of Montreal, Montreal, Quebec, Canada
5. University of Vienna, Vienna, Austria
6. Universitatsklinikum Mannheim, Mannheim, Germany
7. Vita-Salute University, Milan, Italy
8. University of Michigan, Ann Arbor, Michigan
9. Medical University Graz, Graz, Austria
10. University of Rennes, Rennes, France
11. Cornell University, New York, New York
12. Keio University School of Medicine, Tokyo, Japan
13. Clinica Alemana de Santiago, Santiago de Chile, Chile