Text and Data Mining valid from 2019-08-30
Received: 22 March 2019
Accepted: 18 August 2019
First Online: 30 August 2019
Compliance with Ethical Standards
: The author declares that he has no conflict of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (national and institutional).
: No animal studies were carried out by the author of this article.