About this article
Published Online: Oct 23, 2017
Page range: 5 - 9
DOI: https://doi.org/10.1515/amb-2017-0011
Keywords
© 2017 K. Vangelova, published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Vangelova, K.
National Center of Public Health and AnalysesSofia, Bulgaria