Sachse, Rainer
Kramer, Ueli http://orcid.org/0000-0002-5603-0394
Article History
First Online: 9 August 2018
Compliance with Ethical Standards
:
: RS declares that he has no conflict of interest. UK declares that he has 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.
: Informed consent was obtained from all individual participants included in the study.