Text and Data Mining valid from 2018-01-15
Received: 18 November 2017
Accepted: 6 January 2018
First Online: 15 January 2018
Compliance with ethical standards
: The authors have no potential conflicts of interest to declare.
: All procedures 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. The study has been approved by the Jena University Hospital Ethics Committee (5154-05/17). Informed consent was obtained from all individual participants or the responsible persons included in the study.