Affiliation: | (1) S?dersjukhuset, Division of Obstetrics and Gynaecology, Sjukhusbacken 10S-11883, Stockholm, Sweden;(2) Stockholm County Council, Stockholm, Sweden;(3) Karolinska Institute, Medical Management Centre, Stockholm, Sweden;(4) Karolinska Institute, Department of Clinical Science and Education, S?dersjukhuset, Section of Obstetrics and Gynaecology, Stockholm, Sweden |