Kirk, Ulrich
Wieghorst, Anders
Nielsen, Christian Møller
Staiano, Walter
Article History
Received: 22 August 2018
Accepted: 15 November 2018
First Online: 26 November 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.