Text and Data Mining valid from 2020-02-13
Received: 30 July 2019
Accepted: 29 January 2020
First Online: 13 February 2020
Compliance with ethical standards
: No benefits in any form have been received or will be received from a commercial party related directly or indirectly to the subject of this article.
: All the procedures performed in the study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.