D Páez1, R Salazar2, J Tabernero3. 1. Medical Oncology Department, Hospital de la Santa Creu i Sant Pau, Barcelona. 2. Medical Oncology Department, Catalan Institute of Oncology (ICO), CIBERONC, L'Hospitalet de Llobregat, Barcelona. 3. Medical Oncology Department, Vall d'Hebron University Hospital and Institute of Oncology (VHIO), CIBERONC, Universitat Autònoma de Barcelona, Barcelona, Spain.