[This corrects the article DOI: 10.2196/25980.].
©Helene Lundgaard Soberg, Håkon Øgreid Moksnes, Audny Anke, Olav Røise, Cecilie Røe, Eline Aas, Unni Sveen, Christine Gaarder, Pål Aksel Næss, Eirik Helseth, Hilde Margrete Dahl, Frank Becker, Marianne Løvstad, Kristian Bartnes, Christoph Schäfer, Mari S Rasmusssen, Paul Perrin, Juan Lu, Torgeir Hellstrøm, Nada Andelic. Originally published in JMIR Research Protocols (https://www.researchprotocols.org), 23.03.2022.