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Authors
Hoffmann, Esther M.
Schmidtmann, Irene
Siouli, Angeliki
Schuster, Alexander K.
Beutel, Manfred E.
Pfeiffer, Norbert
Lamparter, Julia
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Article History
Received: 26 August 2017
Revised: 6 April 2018
Accepted: 16 April 2018
First Online: 18 May 2018
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.
: Informed consent was obtained from all individual participants included in the study.
