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Folia Medica 61(4): 500-505
doi:
10.3897/folmed.61.e47943
Received:
22 Mar 2019 | Approved:
24 Apr 2019 | Published:
31 Dec 2019
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Authors

Medical University - Sofia, Sofia, Bulgaria
University Hospital Basel, Basel, Switzerland
Medical University - Sofia, Sofia, Bulgaria
Medical University - Sofia, Sofia, Bulgaria
Evgeni V. Mekov
- Corresponding author
Medical University - Sofia, Sofia, 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.