1. a Hospital Clinico Universitario de Salamanca, Salamanca, Spain
2. b Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
3. c University of Turin, Turin, Italy
4. d St. Bartholomew's Hospital, London, United Kingdom
5. e University of Bonn, Bonn, Germany
6. f St Vincent's Comprehensive Cancer Center, New York, New York, USA
7. g Winship Cancer Institute, Atlanta, Georgia, USA
8. h Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina, USA
9. i Virchow-University Hospital, Berlin, Germany
10. j Erasmus Medical Center, Rotterdam, The Netherlands