Text and Data Mining valid from 2018-04-26
Received: 18 February 2018
Accepted: 9 April 2018
First Online: 26 April 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.