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Bulgarian Cardiology 32(1): 99-112
doi:
10.3897/bgcardio.32.e189359
Received:
21 Feb 2026 | Approved:
07 Apr 2026 | Published:
05 May 2026
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Authors
Acibadem City Clinic Vitosha Hospital, Sofia, Bulgaria

A. Keltchev
- Corresponding author
Acibadem City Clinic Vitosha Hospital, Sofia, Bulgaria
Academic editor
St. Anna University Hospital, Sofia, Bulgaria
Medical University Pleven, Pleven, 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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