@article{:/content/10.2807/esm.10.04.00530-es, author = "Turner, J and Kelly, H", title = "", journal = "", year = "", volume = "", number = "", eid = , pages = "", url = "https://www.eurosurveillance.org/content/10.2807/esm.10.04.00530-es", doi = "https://doi.org/" }