Text and Data Mining valid from 2019-12-06
Received: 19 July 2019
Accepted: 1 December 2019
First Online: 6 December 2019
Compliance with ethical standards
: The authors certify that they have NO affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements) or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.