1. Department of Obstetrics and Gynecology, Sodersjukhuset, Stockholm, Sweden;
2. Department of Clinical Science and Education, Section of Obstetrics and Gynaecology, Karolinska Institutet, Sodersjukhuset, Sweden;
3. Department of Molecular and Cellular Physiology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK;
4. Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden