Sitter, Beathe http://orcid.org/0000-0003-1786-6380
Article History
Received: 30 June 2018
Revised: 22 December 2018
Accepted: 24 December 2018
First Online: 4 January 2019
Compliance with ethical standards
:
: The author declares that they have no conflict of interest.
: All procedures 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.