Kurteva, Ekaterina http://orcid.org/0000-0003-1968-5962
Vasilev, Georgi http://orcid.org/0000-0002-6314-6889
Tumangelova-Yuzeir, Kalina http://orcid.org/0000-0001-6143-7538
Ivanova, Irena http://orcid.org/0000-0003-2369-0182
Ivanova-Todorova, Ekaterina http://orcid.org/0000-0002-1833-838X
Velikova, Tsvetelina http://orcid.org/0000-0002-0593-1272
Kyurkchiev, Dobroslav http://orcid.org/0000-0002-8257-7764
Article History
Received: 13 November 2021
Accepted: 31 December 2021
First Online: 20 January 2022
Declarations
:
: The study design and protocol were conducted following the Declaration of Helsinki, previously approved by the Ethics Committee of the University Hospital “St. Ivan Rilski” (Ethics Approval Protocol Number 02/15.02.2021). No sensitivity data were collected in our study.
: All subjects signed informed consent for inclusion in the study.
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