Article History
First Online: 20 December 2019
Compliance with Ethical Standards
:
: The authors state that they have no conflict of interest.
: The research protocol was submitted for consideration, comment, guidance and approval to the university’s research ethics committee. All procedures performed in the study 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.
: Informed consent was obtained from all individual participants included in the study.