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Folia Medica 63(4): 601-607
doi: 10.3897/folmed.63.e58121
Received: 29 Aug 2020 | Approved: 21 Oct 2020 | Published: 31 Aug 2021
This article is part of:
Folia Medica 63(4)
Authors
   
Kalina Ganeva - Corresponding author
St Marina University Hospital, Varna, Bulgaria
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Petar Shivachev
St Marina University Hospital, Varna, Bulgaria
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Nikolay Sapundzhiev
St Marina University Hospital, Varna, Bulgaria
www.e-orl.org
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Lora Nikiforova
St Marina University Hospital, 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 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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