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Bulgarian Cardiology 26(4): 13-25
doi:
10.3897/bgcardio.26.e59263
Published:
30 Dec 2020
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Authors

Tchavdar Shalganov
- Corresponding author
National Heart Hospital, Sofia, Bulgaria

National Heart Hospital, Sofia, Bulgaria
National Heart Hospital, Sofia, Bulgaria

National Heart Hospital, Sofia, Bulgaria
Academic editor

Acibadem City Clinic Tokuda 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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