@article{:/content/10.2807/esm.11.05.00624-fr, author = "Asseva, G and Petrov, P and Ivanov, I and Kantardjiev, T", title = "", journal = "", year = "", volume = "", number = "", eid = , pages = "", url = "https://www.eurosurveillance.org/content/10.2807/esm.11.05.00624-fr", doi = "https://doi.org/" }