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Bulgarian Cardiology 27(3): 103-112
doi:
10.3897/bgcardio.27.e72195
Published:
18 Oct 2021
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Authors

Nikolay Stoyanov
- Corresponding author
Medical university-Sofia, Sofia, Bulgaria
University hospital Saint Anna, Sofia, Bulgaria
University hospital Saint Anna, Sofia, Bulgaria
University hospital Saint Anna, Sofia, Bulgaria
University hospital Saint Anna, Sofia, Bulgaria
University hospital Saint Anna, Sofia, Bulgaria
Academic editor

University Hospital "Sveti Georgi", Plovdiv, 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.