Hauge, Siri Helene; Hungnes, Olav; Rydland, Kjersti Margrethe; Tønnessen, Ragnhild; Oftung, Fredrik; Mjaaland, Siri; Trogstad, Lill; Håberg, Siri Eldevik; Waalen, Kristian; Bragstad, Karoline; De Blasio, Birgitte Freiesleben; Robertson, Anne Hayman (Research report, 2014)