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Folia Medica 62(2): 403-407
doi: 10.3897/folmed.62.e49840
Received: 24 Apr 2019 | Approved: 02 Aug 2019 | Published: 30 Jun 2020
This article is part of:
Folia Medica 62(2)
Authors
   
Zhivka Stoykova - Corresponding author
St Marina University Hospital, Varna, Bulgaria
Medical University of Varna, Varna, Bulgaria
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Liliya Ivanova
St Marina University Hospital, Varna, Bulgaria
Medical University of Varna, Varna, Bulgaria
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Snejinka Cvetkova
Medical University of Varna, Varna, Bulgaria
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Diana Yordanova
Medical University of Varna, Varna, 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 CC0 Public Domain Dedication.
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