Authors
Vl. Milenova
Medical University, Sofia, Bulgaria
D. Yosifov
Medical University, Sofia, Bulgaria
Y. Vlahov
Medical Faculty, Sofia University, Sofia, Bulgaria
V. Tenev
University Hospital, University of Iowa, Iowa city
© 2019 M. Nikolova, Vl. Milenova, D. Yosifov, Y. Vlahov, V. Tenev, published by Sofia Medical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.