About the Authors

Siri Ann Nyrnes

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

siri.a.nyrnes@ntnu.no

Affiliations Department of Circulation and Medical Imaging, NTNU, Norwegian University of Science and Technology, Trondheim, Norway, Department of Pediatrics, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway

Kirsti Krohn Garnæs

Roles Data curation, Investigation, Project administration, Writing – review & editing

Affiliation Department of Circulation and Medical Imaging, NTNU, Norwegian University of Science and Technology, Trondheim, Norway

Øyvind Salvesen

Roles Formal analysis, Methodology, Software, Writing – review & editing

Affiliation Department of Public Health and General Practice, NTNU, Norwegian University of Science and Technology, Trondheim, Norway

Anita Sharma Timilsina

Roles Formal analysis, Writing – review & editing

Affiliation Department of Circulation and Medical Imaging, NTNU, Norwegian University of Science and Technology, Trondheim, Norway

Trine Moholdt

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Project administration, Resources, Writing – review & editing

Affiliations Department of Circulation and Medical Imaging, NTNU, Norwegian University of Science and Technology, Trondheim, Norway, Department of Obstetrics and Gynecology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway

Charlotte Björk Ingul

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Project administration, Resources, Software, Supervision, Validation, Writing – review & editing

Affiliations Department of Circulation and Medical Imaging, NTNU, Norwegian University of Science and Technology, Trondheim, Norway, Helse Midt-Norge RHF, Størdal, Norway

Competing Interests

The last author (CBI) are employed by a commercial company: Helse Midt-Norge RHF. This does not alter our adherence to PLOS ONE policies on sharing data and materials. The other authors have declared that no competing interests exists.