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Authors
Holländare, Fredrik https://orcid.org/0000-0001-9500-7763
Tillfors, Maria
Nordenskjöld, Axel
Sellin, Tabita
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Article History
Received: 6 August 2019
Accepted: 24 December 2019
First Online: 9 January 2020
Ethics approval and consent to participate
: This study was approved by the Regional Ethics Review Board in Uppsala, Sweden (D. no 2015/138). The requirement for informed consent from control subjects was waived due to the retrospective nature of the analyses. All other study procedures were performed in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
