Dahlman, Disa http://orcid.org/0000-0003-0507-8758
Magnusson, Hedvig
Li, Xinjun
Sundquist, Jan
Sundquist, Kristina
Funding for this research was provided by:
National Institute on Drug Abuse (R01DA030005)
Vetenskapsrådet (2016-01176, 2018-02400)
Medicinska Fakulteten, Lunds Universitet (ALF project grant)
Lund University
Article History
Received: 10 August 2020
Accepted: 26 October 2020
First Online: 6 November 2020
Compliance with ethical standards
:
: Disa Dahlman, Hedvig Magnusson, Xinjun Li, Jan Sundquist and Kristina Sundquist) declares that they have no conflict of interest.
: 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. Ethical approval for the study was obtained from the Regional Ethical Review Board in Lund (file number 2012/795).
: Only register data were used in the study. Informed consent was not obtained, which was in accordance with ethical approval from the Regional Ethical Review Board in Lund.
: Only register data were used in the study. Informed consent was not obtained, which was in accordance with ethical approval from the Regional Ethical Review Board in Lund.