Text and Data Mining valid from 2018-10-31
Received: 31 July 2018
Accepted: 22 October 2018
First Online: 31 October 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 1964 and later versions.
: Informed consent or a substitute for such consent was obtained from all patients before inclusion in our study.