Zheng, Jiaojiao
Xie, Shao-Hua
Santoni, Giola
Lagergren, Jesper
Funding for this research was provided by:
Vetenskapsrådet (SIMSAM D0547801)
Cancerfonden (CAN 2015/460)
Article History
Received: 1 July 2019
Revised: 17 September 2019
Accepted: 19 September 2019
First Online: 8 October 2019
Competing interests
: The authors declare no competing interests.
: The study was conducted conforming to the Declaration of Helsinki. According to the Swedish legislation (1998:543) on health data registries, informed consents were generally not needed for registry-based studies in Sweden if the studies had been approved by the local ethical board.<sup>43</sup> This study was approved by Regional Ethical Review Board in Stockholm, Sweden (reference number 2016/982-3/4).
: Not applicable
: This work was supported by Swedish Cancer Society (CAN 2015/460) and Swedish Research Council (SIMSAM D0547801). Both the founding resources were neither involved in the study design, data collection, data analysis and interpretation of the results nor in the writing of the report and in the decision to submit the article for publication.
: All the data in this study were retrieved from the Swedish Prescribed Drugs and Health Cohort. The original data are available from the related registries listed above but restrictions apply to the availability of these data, which were used under license for this study and therefore are not publicly available. The data are, however, available through applications to these registries or reasonable request to the corresponding author (S.X.). The codes for the data analysis are archived by the biostatistician (G.S.).
: 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).