Received: 27 January 2020
Accepted: 30 June 2020
First Online: 13 July 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki, and the protocol was approved by the Kaunas Regional Ethics Committee, Nr. BE-2-11, 21 March 2017.
: All authors approved the final version of the paper.
: The authors declare no conflict of interest.