Received: 18 September 2018
Accepted: 11 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: The study was approved by the Kaunas Region Biomedical Research Ethics Committee. The number of approval No. BE-2-8. No individual informed consent from the participants was required as the data used in this study were anonymised.
: Not applicable.
: The authors declare that they have no competing interests.