[1] Osped Silvestrini, SC Oncol Med, Dept Med Oncol, Perugia, Italy
[2] Inst Nazl Tumori, Dept Med Oncol B, Milan, Italy
[3] Charite Univ Med Berlin, Tumorzentrum Benjamin Franklin, Dept Oncol, D-13353 Berlin, Germany
[4] Serv Cancerol Med, Ctr Leon Berard, Lyon, France
[5] Wojskowy Inst Med, Dept Oncol, Warsaw, Poland
[6] Johannes Gutenberg Univ Mainz, Med Klin 3, Mainz, Germany
[7] Bayer Schering Pharma, Clin Dev, Leverkusen, Germany
[8] Bayer Schering Pharma, Clin Dev, Wuppertal, Germany
[9] Inst Gustave Roussy, Unite Immunotherapie, Villejuif, France