Text and Data Mining valid from 2019-04-13
Received: 8 February 2019
Accepted: 1 April 2019
First Online: 13 April 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Ethical approval was not required as all procedures were part of our routine care. All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional committee and with the 1964 Helsinki Declaration and its later amendments. This article does not contain any studies with animals performed by any of the authors.
: All data of this retrospective study were fully anonymized before the study authors accessed them.