@article{:/content/10.2807/esm.01.01.00197-pt, author = "Hilthunen-Back, E and Haikala, O and Koskela, P and Reunala, T", title = "", journal = "", year = "", volume = "", number = "", eid = , pages = "", url = "https://www.eurosurveillance.org/content/10.2807/esm.01.01.00197-pt", doi = "https://doi.org/" }