Text and Data Mining valid from 2018-10-10
Received: 24 July 2018
Accepted: 14 September 2018
First Online: 10 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 was obtained from all patients for being included in the study.