Text and Data Mining valid from 2018-08-01
Received: 24 October 2017
Accepted: 18 July 2018
First Online: 1 August 2018
Compliance with Ethical Standards
: The authors declare that they have no competing interests.
: This study involved human subjects. All procedures performed in the 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 taken from all the participants and their right to leave the study at any time without any conditions was explained to them.