@article{:/content/10.2807/esm.11.06.00631-es, author = "Koch, J and Stark, K", title = "", journal = "", year = "", volume = "", number = "", eid = , pages = "", url = "https://www.eurosurveillance.org/content/10.2807/esm.11.06.00631-es", doi = "https://doi.org/" }