Tomov, Slavcho T.
Gorchev, Grigor A.
Kiprova, Desislava K.
Lyubenov, Aleksandar D.
Hinkova, Nadezhda H.
Tomova, Vesela D.
Gorcheva, Zornitsa V.
Ahmad, Sarfraz http://orcid.org/0000-0002-5180-0409
Article History
Received: 28 September 2021
Accepted: 21 January 2022
First Online: 10 February 2022
Declarations
:
: None of the authors has any potential financial or commercial conflict of interest associated with this original research manuscript.
: This retrospective study was approved by the Research Ethics Commission of Medical University-Pleven, Bulgaria.
: This retrospective study is classified as quality improvement and hypothesis generating, which is allowed by our Institutional Review Board (Research Ethics Commission) and no patient consent was required.
: The manuscript has been read by all authors who have consented for its publication.