Aase Serine Devold Pay (born 1966) senior adviser and midwife with a PhD in perinatal epidemiology. She has contributed to the design of the study, performed statistical analyses, participated in interpretation of the results and prepared the draft of the manuscript. She took part in the data assessment and has approved the submitted version of the manuscript.
The author has completed the ICMJE form and reports no conflicts of interest.
Department of Hospital Services
Norwegian Directorate of Health
Department of Global Health – Women and Children
Norwegian Institute of Public Health