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Bulgarian Cardiology 27(2): 84-101
doi: 10.3897/bgcardio.27.e69592
Published: 21 Jul 2021
This article is part of:
Bulgarian Cardiology 27(2)
Author
   
   
   
Branimir Kanazirev - Corresponding author
Medical Center "Sana Medic", Varna, Bulgaria
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Academic editor
Nina Gotcheva
National Heart Hospital, Sofia, Bulgaria
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Author contributions
един автор
Conflict of interest
The author has 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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