Text and Data Mining valid from 2018-09-28
Received: 20 July 2018
Accepted: 18 September 2018
First Online: 28 September 2018
Compliance with ethical standards
: 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 to be included in the study, or the equivalent, was obtained from all patients.
: The authors declare that they have no conflict of interest.