Text and Data Mining valid from 2019-09-09
Received: 2 April 2019
Accepted: 25 June 2019
First Online: 9 September 2019
Ethics approval and consent to participate
: This research was conducted in accordance with all relevant guidelines and procedures. The study was approved by the Vilnius Regional Biomedical Ethics Committee.
: The manuscript does not contain any individual person’s data in any form<b>.</b>
: The authors declare that they have no competing interests.