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

por Brøgger, Jan, Nystad, Wenche, Cappelen, Inger, Bakke, Per
Publicado 2007

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

por Feiring, Berit, Laake, Ida, Molden, Tor, Cappelen, Inger, Håberg, Siri E, Magnus, Per, Steingrímsdóttir, Ólöf Anna, Strand, Bjørn Heine, Stålcrantz, Jeanette, Trogstad, Lill
Publicado 2015