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Authors
Jeppesen, Elisabeth https://orcid.org/0000-0001-5949-9377
Iversen, Valdemar Vea
Hansen, Ingrid Schrøder
Reierth, Eirik
Wisborg, Torben
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Article History
Received: 9 October 2019
Accepted: 15 January 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: The authors have aimed for transparency and accuracy. The review followed a structured guideline provided by PRISMA and ethics approval was not needed for this review.
: Not applicable.
: The authors declare that they have no competing interests.
