1University of Cologne, Cologne, Germany
2University Hospital Gasthuisberg, Leuven, Belgium
3University of California, Los Angeles
4Duke University Medical Center, Durham, NC
5University of Mainz, Mainz, Germany
6National Cancer Institute, Bethesda, MD
7Weill Cornell Medical College, New York
8Silesian Medical University, Katowice, Poland
9Sahlgrenska University Hospital, Göteborg, Sweden
10Singapore General Hospital, Singapore, Singapore
11University of Pisa, Pisa, Italy
12Schering-Plough Research Institute, Kenilworth, NJ