Download Article
Download the full article as a PDF file.
Download the full article as a PDF file.
© 2020 R. Yakimova, M. Stoimenova-Popova, P. Chumpalova, M. Pandova, M. Stoyanova, published by Sofia Medical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.