Mygind-Klavsen, Bjarne http://orcid.org/0000-0002-1438-854X
Lund, Bent
Nielsen, Torsten Grønbech
Maagaard, Niels
Kraemer, Otto
Hölmich, Per
Winge, Søren
Lind, Martin
Article History
Received: 15 April 2017
Accepted: 4 April 2018
First Online: 25 April 2018
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: Ethical approval was not sought for the present study. Handling of data from DHAR is approved by the Danish Data Protection Agency and DHAR is approved by the Danish Health Authority.
: For this type of study formal consent is not required.