Suboptimal MMR2 vaccine coverage in six counties in Norway detected through the national immunisation registry, April 2014 to April 2017
Hagerup-Jenssen, Maria and Kongsrud, Sigrun and Riise, Øystein Rolandsen, Eurosurveillance, 22, 30518 (2017), https://doi.org/10.2807/1560-7917.ES.2017.22.17.30518