Text and Data Mining valid from 2018-10-15
Received: 20 November 2017
Accepted: 8 October 2018
First Online: 15 October 2018
Compliance with ethical standards
: All the authors have taken a significant and crucial part in the preparation of the article and that they have read and approved the final version.
: The authors declare that they have no conflict of interest.
: 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. The study submitted has been reviewed by IRB; after reviewing submitted IRB protocol and other related materials, the participated IRB members agreed upon the “Approval” of the research.