Assoc. Prof. Dimitar Stavrev, DSc.
Medical University of Varna “Prof. P. Stoyanov”
https://doi.org/10.53656/his2022-5-6-new

Assoc. Prof. Dimitar Stavrev, DSc.
Medical University of Varna “Prof. P. Stoyanov”
https://doi.org/10.53656/his2022-5-6-new