Received: 17 November 2017
Accepted: 8 January 2019
First Online: 28 January 2019
Ethics approval and consent to participate
: The study was approved by the Danish Data Protection Agency (2008-58-0028). In Denmark, no informed consent is required in order to use data from the Danish Cancer Registry and the Danish Lymphoma Registry for research purposes.
: Not applicable.
: T. M.-L. Andersson is involved in an ongoing public-private real world evidence collaboration between Karolinska Institutet and Janssen Pharmaceuticals. However, the current project is not related to this collaboration.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.