Text and Data Mining valid from 2019-02-11
First Online: 11 February 2019
Compliance with Ethical Standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional review board and/or the national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: We obtained informed consent for this web-based survey research by including an introductory paragraph on a web page that contained (a) the elements of required consent and (b) a link to the survey site for those individuals who voluntarily desired to participate.
: The authors declare that they have no conflicts of interest.