Patient and public involvement in health research in Norway: a survey among researchers and patient organisations. - Aas, Sigve Nyvik; Distefano, Marita Borg; Pettersen, Ingvild; Gravrok, Berit; Nordvoll, Laila Yvonne; Bjaastad, Jon Fauskanger; Grimsgaard, Sameline (Research Involvement & Engagement, 2023)