1UT Southwestern Medical Centre, Dallas, TX, USA
2Emory University, Atlanta, GA, USA
3Mayo Clinic, Rochester, MN, USA
4University Hospital Gasthuisberg, Leuven, Belgium
5Eberhard Karls University, Tübingen, Germany
6Dokuz Eylul University School of Medicine, Izmir, Turkey
7University Medical Centre-Nijmegen, Nijmegen, The Netherlands
8Technical University of Dresden, Dresden, Germany
9Nara Medical University, Nara, Japan
10Rajiv Gandhi Cancer Hospital, New Delhi, India
11Singapore General Hospital, Singapore
12The University of Texas M.D. Anderson Cancer Centre, Houston, TX, USA