Carlsen, Arne http://orcid.org/0000-0002-6005-6394
Grimstad, Tore Bjørn
Karlsen, Lars Normann
Greve, Ole Jacob
Norheim, Katrine Brække
Lea, Dordi
Article History
Received: 8 April 2019
Accepted: 16 May 2019
First Online: 23 May 2019
Compliance with ethical standards
:
: Arne Carlsen, Tore Grimstad, Lars KarlsenO, Ole Jacob Greve, Katrine Norheim and Dordi Lea declare that they have no conflict of interest.
: All procedures followed have been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.
: Informed consent was obtained from all patients for being included in the study.