Text and Data Mining valid from 2018-11-14
Received: 12 February 2018
Accepted: 9 November 2018
First Online: 14 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 and with the Helsinki Declaration of 1964 and later versions.
: Informed consent was obtained from all patients.