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.