@article{:/content/10.2807/ese.17.16.20147-en, author = "Trogstad, L and Ung, G and Hagerup-Jenssen, M and Cappelen, I and Haugen, I L and Feiring, B", title = "The Norwegian immunisation register – SYSVAK", journal = "Eurosurveillance", year = "2012", volume = "17", number = "16", eid = 20147, pages = "", url = "https://www.eurosurveillance.org/content/10.2807/ese.17.16.20147-en", doi = "https://doi.org/10.2807/ese.17.16.20147-en" }