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Folia Medica 61(4): 529-539
doi:
10.3897/folmed.61.e47726
Received:
24 Apr 2019 | Approved:
31 Jul 2019 | Published:
31 Dec 2019
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Authors

Angel M. Dzhambov
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Medical University of Plovdiv, Plovdiv, Bulgaria
Medical University of Plovdiv, Plovdiv, Bulgaria
University of Agribusiness and Rural Development, Plovdiv, Bulgaria
Medical University of Plovdiv, Plovdiv, Bulgaria
Medical University of Plovdiv, Plovdiv, 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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