Funding for this research was provided by:
Varian Medical Systems (NA)
Received: 12 April 2020
Accepted: 1 May 2020
First Online: 1 June 2020
Change Date: 14 December 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: Ethics approval was obtained by the lead ethics committee in Zurich (BASEC-Nr. 2016–01807) and from all participating centers at their local ethics committees. All patients signed consent forms.
: NS: travel grants from Merck Sharpe & Dohme, Astellas, Bayer and Bristol-Myers-Squibb. DB reports personal fees from Siemens AG, personal fees from NB Capital Research GmbH, personal fees from NB Capital ApS, personal fees from b.e. Imaging GmbH outside the submitted work. MS: remuneration for lectures from Merck Serono and AstraZeneca.All other authors declare no conflicts of interest.