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Authors
Yang, Runkuan https://orcid.org/0000-0001-7401-7057
Tonnesseen, Tor Inge
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Funding
Funding for this research was provided by:
South-Eastern Norway Regional Health Authority, (Grant number 2013121.)
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Article History
Received: 22 May 2018
Accepted: 2 November 2018
First Online: 24 November 2018
Compliance with ethical requirements
: This investigation has complete compliance with ethical standards.
: The authors declare that they have no conflicts of interest.
: Not applicable for a review article.
: Not applicable for a review article.
