Graulich, T. http://orcid.org/0000-0003-1896-1945
Steimer, D.
Zhang, D.
Omar, M.
Weber-Spickschen, S.
Krettek, C.
Panzica, M.
Article History
Received: 19 August 2018
First Online: 28 January 2019
Compliance with ethical standards
:
: All 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. For this type of study formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.