Madsbu, Mattis A. http://orcid.org/0000-0001-9307-4874
Salvesen, Øyvind
Carlsen, Sven M.
Westin, Steinar
Onarheim, Kristian
Nygaard, Øystein P.
Solberg, Tore K.
Gulati, Sasha
Article History
Received: 14 November 2019
Accepted: 20 December 2019
First Online: 4 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the regional committee for medical research in central Norway (ID2016/840) and all participants provided written informed consent. The Data Inspectorate of Norway approved the registry protocol.