Text and Data Mining valid from 2019-06-25
Received: 7 February 2019
Accepted: 14 June 2019
First Online: 25 June 2019
Compliance with Ethical Standards
: Kent Søe, Thomas Levin Andersen, Maja Hinge, Lars Rolighed, Niels Marcussen, and Jean-Marie Delaisse declare that they have no conflict of interests.
: All procedurse performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (The Scientific Eithical Committee for the Region of Southern Denmark S-20070121 and S20070019) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.