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Article History

Received: 11 December 2019

Accepted: 17 November 2020

First Online: 4 December 2020

Change Date: 8 May 2021

Change Type: Update

Change Details: The duplicate ESM has been removed.

Compliance with ethical standards

:

: Frida Schain is now the owner of and employed by Schain Research AB and acts as a contractor for Janssen; has also been an employee for Janssen; has also previously been a shareholder of Johnson & Johnson stocks; and is affiliated to Karolinska Institutet but receives no payments or salary. Nurgul Batyrbekova is employed by Scandinavian Development Services, who received financial compensation from Janssen-Cilag for conducting statistical analysis. Simona Baculea is employed by Janssen and owns company shares. Johan Liwing is employed by Janssen and owns stocks and options. Thomas Webb was previously employed by Janssen Global Services; reports personal fees from Janssen during the conduct of the study; and is now employed by Eisai Ltd, UK. Mats Remberger and Jonas Mattsson declare they have no conflicts of interest.

: This study was approved by Stockholm ethics committee (dnr 2017/1716–31/1).

: Data were collected from population-wide registers without the requirement for individual consent.

: All authors have approved the manuscript for submission. We declare that all authors have made substantial contributions to the study, drafted the work or revised it critically for important intellectual content, approved the version to be published, and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

: These findings were submitted as an abstract to the International Society for Pharmacoeconomics and Outcomes Research conference (18–22 May 2019) and presented as a poster. Supplementary Method Fig. a was presented in a poster at the American Society for Blood and Marrow Transplantation conference (20–24 February 2019).