Authors
Aneliya I. Chifligarska
Department of Surgical Nursing, Medical University – Pleven, Bulgaria
Makreta T. Draganova
Department of Public Health Sciences, Medical University – Pleven, Bulgaria
© 2019 Aneliya I. Chifligarska, Makreta T. Draganova, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.