[1] Univ Klinikum Essen, Westdeutsch Tumorzentrum, Essen, Germany
[2] Univ Hosp Leuven, Leuven, Belgium
[3] Univ Naples 2, Naples, Italy
[4] Inst Reg Canc Montpellier, Montpellier, France
[5] Aix Marseille Univ, Marseille, France
[6] Univ Klin Mannheim, Mannheim, Germany
[7] Univ Texas Southwestern Med Ctr Dallas, Dallas, TX 75390 USA
[8] Hosp Univ Doce Octubre, Madrid, Spain
[9] Mayo Clin, Rochester, MN USA
[10] Bayer Pharma AG, Berlin, Germany
[11] Univ Pisa, Pisa, Italy
[12] Fdn Poliambulanza, Brescia, Italy