@article{:/content/10.2807/esm.08.11.00430-es, author = "Takkinen, J and Ammon, A and Robstad, O and Breuer, T", title = "", journal = "", year = "", volume = "", number = "", eid = , pages = "", url = "https://www.eurosurveillance.org/content/10.2807/esm.08.11.00430-es", doi = "https://doi.org/" }