Müller, Stig http://orcid.org/0000-0001-6749-0890
Lilleaasen, Gunder
Sand, Tor Erik
Løfsgaard, Lars
Estop-Garanto, Manuela
Helgø, Dan
Sund, Peter
Mygland, Vegard
Article History
Received: 6 November 2017
Accepted: 23 February 2018
First Online: 5 March 2018
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: This quality assurance audit was approved by the Institutional Review Board.
: Informed consent was not obtained as this study is a retrospective audit.