Elsayad, Khaled http://orcid.org/0000-0001-9303-7336
Kroeger, Kai
Greve, Burkhard
Moustakis, Christos
Assaf, Chalid
Stadler, Rudolf
Lenz, Georg
Weishaupt, Carsten
Eich, Hans Theodor
Article History
Received: 25 March 2019
Accepted: 10 September 2019
First Online: 7 October 2019
Compliance with ethical guidelines
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: K. Elsayad, K. Kroeger, B. Greve, C. Moustakis, C. Assaf, R. Stadler, G. Lenz, C. Weishaupt, and H.T. Eich declare that they have no competing interests.
: Ethics approval and consent to participate: patients signed consent prior to treatment being initiated and data being collected. Consent for publication: patients signed consent prior to treatment being initiated and data being collected. Ethical approval: 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.