About this article
Published Online: Oct 22, 2021
Page range: 77 - 82
Received: Feb 03, 2021
Accepted: Mar 27, 2021
DOI: https://doi.org/10.2478/amb-2021-0040
Keywords
© 2021 R. Cherneva et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Cherneva, R.
University Hospital for Respiratory Diseases “Sv. Sophia“ – SofiaBulgaria
Cherneva, Z.
The Ministry of Internal Affairs, Clinic of Cardiology – SofiaBulgaria