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Folia Medica 61(3): 370-376
doi: 10.3897/folmed.61.e39409
Received: 17 Feb 2019 | Approved: 25 Mar 2019 | Published: 30 Sep 2019
This article is part of:
Folia Medica 61(3)
Authors
Daniel Doykov - Corresponding author
Medical University, Plovdiv, Bulgaria
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Vladimir Andonov
Medical University, Plovdiv, 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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