Article History
Received: 8 November 2018
Accepted: 29 January 2019
First Online: 15 February 2019
Compliance with Ethical Standards
:
: The authors of this study declare that there are 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.
: All the included participants of the study gave informed consent. When participants were under 18 years of age, their parents or caregivers gave informed consent.