Text and Data Mining valid from 2018-03-14
Received: 21 August 2017
Accepted: 6 March 2018
First Online: 14 March 2018
Compliance with ethical standards
: All procedures performed here including human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Data used in this study is accessible via: ExternalRef removed.
: The authors declare that they have no competing interests.
: Informed consent was obtained from all individual participants included in the study.