Purtskhvanidze, Konstantine http://orcid.org/0000-0002-1425-5245
Saeger, Mark
Treumer, Felix
Roider, Johann
Nölle, Bernhard
Article History
Received: 10 January 2018
Accepted: 2 January 2019
First Online: 10 January 2019
Ethics approval and consent to participate
: This study adhered to the tenets of the Declaration of Helsinki. For this retrospective type of study formal consent is not required according the regulations of the IRB Universitiy Medical Center Schleswig-Holstein.
: Not applicable.
: The authors declare that they have no competing interests.
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