Article History
Received: 19 January 2018
Accepted: 9 May 2018
First Online: 22 May 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflicts 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. For this type of study, formal consent is not required.
: Informed consent was obtained from all individuals included in the study.