Funding for this research was provided by:
Uppsala Universitet (1)
Received: 29 November 2019
Accepted: 24 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the local ethical committee at Uppsala University (Dnr 2015/196) and registered at ExternalRef removed (NCT03534596, retrospectively registered 2018-05-24).Informed consent was not obtained from individual participants included in the study. The study was approved by the local ethical committee at Uppsala University, informed consent was not needed. The study was retrospective and contained no sensitive data and no data at the individual level.
: Not applicable.
: The authors (TS, MC and UK) declare that they have no competing interests.