1 Centre for Translational Microbiome Research, Department of Microbiology, Tumour and Cell Biology, Science for Life Laboratory, Karolinska Institutet, Solna, Sweden.
2 Department of Medicine Solna, Division of Infectious Diseases, Karolinska University Hospital, Center for Molecular Medicine, Karolinska Institutet, Solna, Sweden.
3 The Recurrent Pregnancy Loss Unit, Capital Region of Denmark, Rigshospitalet and Hvidovre Hospital, Copenhagen, Denmark.
4 Department of Clinical Immunology, Copenhagen University Hospital, Copenhagen, Denmark.
5 Department of Obstetrics and Gynaecology, Holbæk Hospital, Holbæk, Denmark.
6 Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
7 The Recurrent Pregnancy Loss Unit, Capital Region of Denmark, Rigshospitalet and Hvidovre Hospital, Copenhagen, Denmark lars.engstrand@ki.se.
8 Department of Obstetrics and Gynecology, Hvidovre Hospital, Copenhagen, Denmark.