I. Cappelen

No Increase in Response Rate by Adding a Web Response Option to a Postal Population Survey: A Randomized Trial

J. Brøgger, W. Nystad, I. Cappelen, 2007, Journal of medical Internet research.

Do parental education and income matter? A nationwide register-based study on HPV vaccine uptake in the school-based immunisation programme in Norway

P. Magnus, Ó. Steingrímsdóttir, L. Trogstad, 2015, BMJ Open.

Risk of fetal death after pandemic influenza virus infection or vaccination.

A. Wilcox, S. Vollset, P. Nafstad, 2013, The New England journal of medicine.

[The Norwegian patient register--an important source for research].

C. Stoltenberg, I. Bakken, P. Surén, 2014, Tidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke.

Consequences of hip fracture on activities of daily life and residential needs

L. Nordsletten, I. Kristiansen, H. Meyer, 2004, Osteoporosis International.

The Norwegian immunisation register--SYSVAK.

L. Trogstad, L Trogstad, G Ung, 2012, Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin.

Local and national electronic databases in Norway demonstrate a varying degree of validity.

L. Nordsletten, I. Kristiansen, H. Meyer, 2005, Journal of clinical epidemiology.

Risk of fetal death after pandemic influenza virus infection or vaccination.

A. Wilcox, S. Vollset, P. Nafstad, 2013, The New England journal of medicine.