1. St James's University Hospital; Leeds; UK
2. Mayo School of Medicine; Rochester; MN; USA
3. Baylor Sammons Cancer Center; Dallas; TX; USA
4. Hopital Pitie Salpetriere; Paris; France
5. IRCCS Policlinico San Matteo and University of Pavia; Pavia; Italy
6. Hospital Universitario de Salamanca; Salamanca; Spain
7. Niguarda Ca'Granda Hospital; Milan; Italy
8. Hospitalier Schaffner; Lens; France
9. Dana Farber Cancer Institute; Harvard Medical School; Boston; MA; USA
10. Royal Prince Alfred Hospital; Sydney; NSW; Australia
11. University of Athens School of Medicine; Athens; Greece
12. Hopital Huriez; Lille; France
13. Karolinska Institute and Karolinska University Hospital; Stockholm; Sweden