Sommer, Falk http://orcid.org/0000-0003-3651-9405
Spörl, Eberhard
Herber, Robert
Pillunat, Lutz E.
Terai, Naim
Article History
Received: 19 February 2019
Revised: 8 July 2019
Accepted: 22 July 2019
First Online: 15 August 2019
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. For this type of study (retrospective study), formal consent was not required.