Text and Data Mining valid from 2018-04-24
Received: 10 April 2018
Accepted: 18 April 2018
First Online: 24 April 2018
Compliance with ethical standards
: The authors declare that they did not receive and will not receive any benefits or funding from any commercial party related directly or indirectly to the subject of this article.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.