Authors
M. Siderova
Medical University of Varna, UMHAT “Sveta Marina” – Varna, Bulgaria
Zh. Ruseva
Medical University of Varna, UMHAT “Sveta Marina” – Varna, Bulgaria
© 2026 R. Dimitrova, M. Siderova, Zh. Ruseva, published by Medical University - Sofia
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.