Ziebolz, Dirk http://orcid.org/0000-0002-9810-2368
Douglas, David
Douglas, Donya
Schmickler, Jan
Patschan, Daniel http://orcid.org/0000-0002-5232-9540
Müller, Gerhard A.
Haak, Rainer http://orcid.org/0000-0002-3716-4231
Schmidt, Jana
Schmalz, Gerhard
Patschan, Susann
Article History
Received: 6 February 2018
Accepted: 15 March 2018
First Online: 20 March 2018
Compliance with ethical standards
:
: The study was reviewed and approved by the ethics committee of the medical faculty of the Georg-August-University, Goettingen, Germany (application number 14/2/13).
: Patients were informed verbally and in writing about the study and gave written informed consent.
: The authors declare that they have no conflict of interests: The authors assure that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject matter or materials discussed in this manuscript.