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Folia Medica 61(3): 462-466
doi: 10.3897/folmed.61.e39415
Received: 13 Feb 2019 | Approved: 01 Apr 2019 | Published: 30 Sep 2019
This article is part of:
Folia Medica 61(3)
Authors
Borislav Kitov
Medical University, Plovdiv, Bulgaria
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Ivo Kehayov - Corresponding author
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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