97 urn:lsid:arphahub.com:pub:B5033382-9D21-53CE-B630-B4E3A1146D51 Bulgarian Cardiology Bulgarian Cardiology 1310-7488 2683-1015 Bulgarian Society of Cardiology 10.3897/bgcardio.26.e59342 59342 Editorial Editorial Gatzov Plamen sv.tsvetanova@gmail.com 1 Second MHAT, Sofia, Bulgaria Second MHAT Sofia Bulgaria

Corresponding author: Plamen Gatzov (sv.tsvetanova@gmail.com).

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2020 09 10 2020 26 3 5 5 6BD4085C-1A42-51C3-B1C1-6879226BE1A9 4097681 Plamen Gatzov 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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