Text and Data Mining valid from 2019-01-02
Received: 16 August 2018
Accepted: 17 December 2018
First Online: 2 January 2019
Compliance with ethical standards
: The authors do not disclose any conflicts of interest.
: This article does not contain any studies with human participants or animal performed by any of the authors.
: Informed consent has been signed by all the participants.