Text and Data Mining valid from 2019-01-17
Received: 10 September 2018
Accepted: 22 December 2018
First Online: 17 January 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: Both phases of the project were approved by the institutional review board (IRB) at the university where the research was conducted. 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 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.
: The datasets generated during and analyzed during the current study are available from the corresponding author on reasonable request.