Kostov, Kiril
Janyan, Armina
Article History
Received: 2 August 2019
Accepted: 24 March 2020
First Online: 4 April 2020
Compliance with ethical standards
:
: K. K. declares that he has no conflict of interest. A. J. declares that she has no conflict 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.
: Informed consent was obtained from all individual participants included in the study.