Chaudry, Mavish S.
Gislason, Gunnar H.
Kamper, Anne-Lise
Rix, Marianne
Dahl, Anders
Østergaard, Lauge
Fosbøl, Emil L.
Lauridsen, Trine K.
Oestergaard, Louise B.
Hassager, Christian
Torp-Pedersen, Christian
Bruun, Niels E.
Article History
Received: 1 December 2017
Accepted: 27 August 2018
First Online: 3 September 2018
Ethics approval and consent to participate
: The study was approved by the Danish Data Protection Agency (ref. 2007–58-0015 / internal ref. GEH-2014-015 I-suite no. 02733). Retrospective studies in registries do not require ethical approval or participant consent in Denmark.
: Not applicable.
: The authors declare that they have no competing interests.
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