About the Authors

Guri Baardstu Majak

gurifb@hotmail.com

Affiliations Department of Obstetrics, Division of Gynecology and Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway, Norwegian National Advisory Unit on Women´s Health, Oslo University Hospital, Rikshospitalet, Oslo, Norway

Anna Varberg Reisæter

Affiliation The Norwegian Renal Registry, Department of Transplantation Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway

Manuela Zucknick

Affiliation Oslo Centre for Biostatistics and Epidemiology, Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway

Bjørg Lorentzen

Affiliation Department of Obstetrics, Division of Gynecology and Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway

Siri Vangen

Affiliations Norwegian National Advisory Unit on Women´s Health, Oslo University Hospital, Rikshospitalet, Oslo, Norway, University of Oslo, Oslo, Norway

Tore Henriksen

Affiliations Department of Obstetrics, Division of Gynecology and Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway, University of Oslo, Oslo, Norway

Trond Melbye Michelsen

Affiliations Department of Obstetrics, Division of Gynecology and Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway, Norwegian National Advisory Unit on Women´s Health, Oslo University Hospital, Rikshospitalet, Oslo, Norway, Research Unit, Sørlandet Hospital, Arendal, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: TMM BL GBM. Data curation: GBM TMM AVR. Formal analysis: MZ GBM TMM. Funding acquisition: TMM. Investigation: GBM AVR TMM. Methodology: TMM AVR GBM SV BL TH. Project administration: TMM GBM. Supervision: TMM. Validation: TMM. Visualization: GBM TMM AVR MZ. Writing – original draft: GBM TMM AVR. Writing – review & editing: GBM AVR MZ BL SV TH TMM.