Sommerfeld, Eliane http://orcid.org/0000-0001-5017-9326
Article History
First Online: 5 October 2017
Compliance with Ethical Standards
:
: All procedures performed in the study 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.
: The author states that there is no conflict of interest.