Assion, H.-J.
Schweppe, A.
Reinbold, H.
Frommberger, U.
Article History
First Online: 21 March 2018
Compliance with ethical guidelines
:
: H.-J. Assion, A. Schweppe, H. Reinbold, and U. Frommberger declare that they have no competing interests.
: 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.