Derks, Marloes G. M. http://orcid.org/0000-0003-4327-8523
,
Bastiaannet, Esther
Kiderlen, Mandy
Hilling, Denise E.
Boelens, Petra G.
Walsh, Paul M.
van Eycken, Elizabeth
Siesling, Sabine
Broggio, John
Wyld, Lynda
Trojanowski, Maciej
Kolacinska, Agnieszka
Chalubinska-Fendler, Justyna
Gonçalves, Ana Filipa
Nowikiewicz, Tomasz
Zegarski, Wojciech
Audisio, Riccardo A.
Liefers, Gerrit-Jan
Portielje, Johanneke E. A.
van de Velde, Cornelis J. H.
Article History
Received: 17 November 2017
Revised: 23 March 2018
Accepted: 28 March 2018
First Online: 7 June 2018
Conflict of interest
: The authors declare that they have no conflict of interest.
: Cancer registries provided anonymised patient data. Therefore, informed consent from patients or ethical approval were not required for this study.
: Patient level data are available upon request from the separate participating cancer registries. Access to the full data set will be provided if each participating cancer registry gives permission for data sharing. Statistical code is available upon request with the corresponding author.
: This work was supported by the European Society of Surgical Oncology (ESSO). The funding source had no role in the study design, data collection, analysis, interpretation of the data, writing of the manuscript, or the decision to publish. Researchers were independent from the funding source.
: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).