Text and Data Mining valid from 2018-11-09
Received: 15 September 2018
Accepted: 25 October 2018
First Online: 9 November 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, and its late amendments.
: This article does not contain any studies with human or animal subjects performed by any of the authors.
: Additional informed consent was obtained from all patients for which identifying information is not included in this article.