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Folia Medica 62(2): 238-243
doi:
10.3897/folmed.62.e39599
Received:
31 Aug 2019 | Approved:
25 Feb 2020 | Published:
30 Jun 2020
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Authors
Teodora Karteva 
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Operative Dentistry and Endodontics, Faculty of Dental Medicine, Medical University - Plovdiv, Plovdiv, Bulgaria
Operative Dentistry and Endodontics, Faculty of Dental Medicine, Medical University - Plovdiv, Plovdiv, Bulgaria
Conflict of interest
The authors have declared that no competing interests exist.
Supporting agencies
National Science Fund of Bulgaria (Contract No. DM-13/2,15.12 2017)
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.