Gunnarsdottir, J.
Akhter, T.
Högberg, U.
Cnattingius, S.
Wikström, A. K.
Funding for this research was provided by:
Vetenskapsrådet (project 2014-3561)
Stockholms Läns Landsting (ALF project grant 20150118)
Article History
Received: 2 November 2018
Accepted: 25 April 2019
First Online: 28 May 2019
Ethics approval and consent to participate
: The Regional Ethical Board in Stockholm approved the study. Permission was obtained to access clinical data from all pregnancies resulting in a birth of an infant at 22 gestational weeks or later in Stockholm and Gotland from 2008 to 2014, and to study pregnancy and delivery complications using this database.Reference numbers 2009/275–31, 2012/365–32 and 2014/962–32
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.