Tarancón-Diez, María
Büttner, Reinhard
Friedrichs, Nicolaus
Article History
Received: 26 July 2018
Accepted: 21 December 2018
First Online: 6 January 2019
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 institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.For this type of study formal consent is not required.