[1] Univ Ziekenhuis Antwerpen, Dept Med Oncol, B-2650 Edegem, Belgium
[2] Natl Inst Oncol, Budapest, Hungary
[3] Univ Med Ctr Nijmegen, Nijmegen, Netherlands
[4] EORTC Data Ctr, Brussels, Belgium
[5] Inst Catala Oncol, Barcelona, Spain
[6] Ctr Oscar Lambret, F-59020 Lille, France
[7] Charing Cross Hosp, London, England
[8] Inst Oncol & Radiol, Belgrade, Serbia
[9] Univ Hosp Motol, Prague, Czech Republic
[10] Caritasklin St Theresia, Saarbrucken, Germany
[11] Ziekenhuis Netwerk Antwerpen Middelheim, Antwerp, Belgium
[12] Inst Jules Bordet, B-1000 Brussels, Belgium
[13] Ctr Reg Lutte Contre Canc Val Aurelle, Montpellier, France
[14] Kaiser Franz Josef Spital, Vienna, Austria
[15] Sanofi Aventis Global Oncol, Paris, France
[16] Clin Genolier, Genolier, Switzerland