Trapp, Sabrina
Havlicek, Ondrej
Schirmer, Annett
Keller, Peter E.
Article History
Received: 17 August 2017
Accepted: 11 January 2018
First Online: 17 January 2018
Compliance with ethical standards
:
: All authors declare 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.