Text and Data Mining valid from 2019-11-21
Received: 9 September 2019
Accepted: 11 November 2019
First Online: 21 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The manuscript does not contain clinical studies or identifying patient data.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: No informed consent was necessary for the study given the absence of identifying patient data.