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Folia Medica 61(4): 506-511
doi:
10.3897/folmed.61.e48259
Received:
22 Jun 2019 | Approved:
01 Aug 2019 | Published:
31 Dec 2019
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Authors
Medical University of Plovdiv, Plovdiv, Bulgaria
Snezhina Kostianeva-Zhelinska
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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 CC0 Public Domain Dedication.
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