Authors
vladimir.grigorov@mu-pleven.bg
Arwyp Medical Center and Glynnwood Hospital, Johannesburg, Republic of South Africa
Faculty of Medicine, Medical University – Pleven, Bulgaria
vladimir.grigorov@mu-pleven.bg
© 2022 V. Grigorov, M. Grigorov, E. Grigorov, H. Nocheva, published by Sofia Medical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.