Received: 18 July 2017
Accepted: 25 June 2018
First Online: 14 August 2018
Ethics approval and consent to participate
: We received approval from the Royal Marsden Committee for Clinical Research to obtain patient records and perform this analysis (CCR1575). Only data already available on electronic patient records was used. Since anonymised data was collected retrospectively and patients’ management was not influenced by the data, a specific consent was not required.
: Not applicable
: D.C. has received research funding from Amgen, Astra Zeneca, Bayer, Celgene, Medimmune, Merrimack, Merck Serono and Sanofi. The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.