Text and Data Mining valid from 2019-11-15
Received: 17 August 2019
Accepted: 4 November 2019
First Online: 15 November 2019
Compliance with ethical standards
: The authors declare that they have no conflicts 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 1975, as revised in 2008.
: Informed consent was obtained from all patients for being included in the study.