Received: 17 November 2020
Accepted: 29 January 2021
First Online: 18 March 2021
Ethics approval and consent to participate
: Investigations were carried out in accordance with the Declaration of Helsinki of 1975 (revised in 2008). The study was approved by the Institutional Review Board and the Independent Ethics Committee of Vilnius University (Vilnius Regional Biomedical Research Ethics Committee, No. 158200-580-PPI-17, 11 June 2013).
: Not applicable.