Provan, S. A. http://orcid.org/0000-0001-5442-902X
Rollefstad, S.
Ikdahl, E.
Mathiessen, A.
Berg, I. J.
Eeg, I.
Wilkinson, I. B.
McEniery, C. M.
Kvien, T. K.
Hammer, H. B.
Østerås, N.
Haugen, I. K.
Semb, A. G.
Article History
Received: 1 March 2019
Accepted: 24 July 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: The MUST study was approved by the Norwegian Regional Committee for Medical and Health Research Ethics South East (reference numbers 2009/812 and 2009/1703) and the participant gave their written informed consent according to the Declaration of Helsinki prior to inclusion.The OCP was approved by the Norwegian Regional Committee for Medical and Health Research Ethics South East (reference numbers 2009/1703) and the participants gave their written informed consent according to the Declaration.
: Not applicable.
: The authors declare that they have no competing interests.