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Folia Medica 62(4): 703-711
doi:
10.3897/folmed.62.e49517
Received:
18 Dec 2019 | Approved:
14 Jul 2020 | Published:
31 Dec 2020
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Authors
Georgi Popivanov
- Corresponding author
Military Medical Academy, Sofia, Bulgaria
Military Medical Academy, Sofia, Bulgaria
Military Medical Academy, Sofia, Bulgaria
University of Perugia, Terni, Italy
Military Medical Academy, Sofia, Bulgaria
Military Medical Academy, Sofia, Bulgaria
Medical University of Pleven, Pleven, Bulgaria
Military Medical Academy, 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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