@article{:/content/10.2807/esm.09.01.00442-en, author = "Meerhoff, T J and Meijer, A and Paget, W J and on behalf of EISS", title = "Methods for sentinel virological surveillance of influenza in Europe - an 18-country survey", journal = "Eurosurveillance", year = "2004", volume = "9", number = "1", eid = 442, pages = "34-38", url = "https://www.eurosurveillance.org/content/10.2807/esm.09.01.00442-en", doi = "https://doi.org/10.2807/esm.09.01.00442-en" }