1 Department of Medical Oncology, Catalan Institute of Oncology, Oncobell Program, IDIBELL, CIBERONC, Universitat de Barcelona, L'Hospitalet, Spain.
2 Unit of Biomarkers and Susceptibility, Cancer Prevention and Control Program, Catalan Institute of Oncology, Oncobell Program, IDIBELL, CIBERESP, L'Hospitalet, Barcelona, Spain.
3 Department of Medical Oncology, Catalan Institute of Oncology, Oncobell Program, IDIBELL, CIBERONC, Universitat de Barcelona, L'Hospitalet, Spain. Electronic address: ramonsalazar@iconcologia.net.