Affiliation: | aDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden;bDivision of Obstetrics and Gynecology, Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Karolinska Institutet, Stockholm, Sweden;cDepartment of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Academy at Gothenburg University, Gothenburg, Sweden |