Article History
Received: 13 August 2018
Accepted: 8 November 2018
First Online: 13 November 2018
Compliance with ethical standards
:
: No funding was received for this study.
: The authors declare that they have no conflict of interest.
: 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. For this type of study formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.