Text and Data Mining valid from 2019-05-27
Received: 6 May 2019
Accepted: 15 May 2019
First Online: 27 May 2019
Compliance with ethical standards
: None of the authors have any conflicts of interests to report.
: This article does not contain any studies with human participants or animals performed by the author.
: This article does not contain any study with animals performed by the author.
: For this type of article informed consent is not required.