Authors
Krasina P. Valcheva
Division of Ophthalmology, Medical University, Pleven, Bulgaria
Snejana V. Murgova
Division of Ophthalmology, Medical University, Pleven, Bulgaria
© 2019 Krasina P. Valcheva, Snejana V. Murgova, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.