Hernández-Durán, Silvia http://orcid.org/0000-0003-0959-8697
Mielke, Dorothee
Rohde, Veit
Malinova, Vesna
Article History
Received: 16 October 2017
Revised: 29 December 2017
Accepted: 4 January 2018
First Online: 1 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was performed in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: For this type of study (retrospective analysis), formal consent is not required. Upon admission, patients at our institution sign a treatment contract, in which the use of anonymized patient data for research purposes is consented to.