[1] Inst Catala Oncol, Dept Med Oncol, Barcelona 08907, Spain
[2] Hosp Santa Creu & Sant Pau, Barcelona 08025, Spain
[3] Hosp St Joan, Tarragona 43201, Spain
[4] Hosp Doce Octubre, Madrid 28041, Spain
[5] Inst Valenciano Oncol, Valencia 46009, Spain
[6] Hosp del Mar, Barcelona 08003, Spain
[7] Hosp Aranzazu, San Sebastian 20014, Guipuzcoa, Spain
[8] Aventis Pharma SA, Dept Med, Madrid 28027, Spain