Received: 17 February 2021
Accepted: 12 April 2021
First Online: 24 April 2021
: Ethical consent was obtained from the Ethics Committee at University College London, UK and from the Kaunas Regional Biomedical Research Ethics Committee, Lithuania (January 11, 2005; No. 05/09). Informed consent was been obtained from all participants. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.