Kabakchieva, Plamena https://orcid.org/0000-0003-3577-0577
Georgiev, Tsvetoslav https://orcid.org/0000-0002-1652-4648
Gateva, Antoaneta https://orcid.org/0000-0002-8030-4498
Hristova, Julieta https://orcid.org/0000-0001-9915-3282
Kamenov, Zdravko https://orcid.org/0000-0002-4829-9449
Funding for this research was provided by:
Medical University Sofia (8378/20.11.2019 with Contract D-85/24.06.2020)
Article History
Received: 11 March 2021
Revised: 22 April 2021
Accepted: 25 April 2021
First Online: 4 May 2021
Declarations
:
: The study protocol was approved by the Research Ethics Committee of the Medical University of Sofia, Bulgaria with approval protocol number 05/28.02.2020.
: Written informed consent was obtained from all participants included in the study.
: None.