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Folia Medica 61(4): 630-633
doi: 10.3897/folmed.61.e47829
Received: 29 Apr 2019 | Approved: 23 May 2019 | Published: 31 Dec 2019
This article is part of:
Folia Medica 61(4)
Authors
   
Todor P. Shamov - Corresponding author
Military Medical Academy, Sofia, Bulgaria
www.dr-shamov.com
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Ioanna Tivcheva
Medical University - Sofia, Sofia, Bulgaria
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Tihomir Eftimov
Military Medical Academy, Sofia, Bulgaria
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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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