@article{:/content/10.2807/esm.07.03.00338-es, author = "Swaan, C and van den Broek, P- J. and Wijnands, S and van Steenbergen, J. E.", title = "", journal = "", year = "", volume = "", number = "", eid = , pages = "", url = "https://www.eurosurveillance.org/content/10.2807/esm.07.03.00338-es", doi = "https://doi.org/" }