Authors
Medical University, ENT Clinic, “Tzaritsa Yoanna-ISUL” University Hospital, Sofia, Bulgaria
Antoaneta Manolova
National Center for Public Health and Analysis, Sofia, Bulgaria
© 2021 Toma Avramov, Dilyana Vicheva, Antoaneta Manolova, published by Romanian Rhinologic Society
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.