1 Department of Medical Oncology, University Hospital Puerta de Hierro-Majadahonda, Calle Joaquin Rodrigo 2, 28222 Madrid, Spain. Electronic address: arcasado@salud.madrid.org.
2 Department of Medical Oncology, University Hospital Puerta de Hierro-Majadahonda, Calle Joaquin Rodrigo 2, 28222 Madrid, Spain.
3 Department of Pharmacy, University Hospital Puerta de Hierro, Majadahonda, Spain. Electronic address: marta.manso@salud.madrid.org.
4 Department of Gastroenterology, University Hospital Puerta de Hierro, Majadahonda, Spain. Electronic address: mariano.gonzalezhaba@salud.madrid.org.
5 Tumour Registry, University Hospital Puerta de Hierro, Majadahonda, Spain. Electronic address: cescudero@salud.madrid.org.