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Bulgarian Cardiology 27(3): 69-87
doi:
10.3897/bgcardio.27.e71177
Published:
18 Oct 2021
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Authors

Vassil Traykov
- Corresponding author
Acibadem City Clinic Tokuda Hospital, Sofia, Bulgaria
Sveta Ekaterina Hospital, Sofia, Bulgaria
MHAT Trakiya, Stara Zagora, Bulgaria
National Heart Hospital, Sofia, Bulgaria
Acibadem City Clinic Tokuda Hospital, Sofia, Bulgaria
UMHAT Sveta Anna, Sofia, Bulgaria
Academic editor

National Heart Hospital, Sofia, Bulgaria
Conflict of interest
The authors have declared that no competing interests exist.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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