Text and Data Mining valid from 2018-06-06
Received: 27 February 2018
Accepted: 25 May 2018
First Online: 6 June 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in this 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.
: Informed consent was obtained from the only participant included in the study.