1 Materno-fetal and Obstetrics Research Unit, Department Woman-Mother-Child, Lausanne University Hospital, Lausanne, 1011, Switzerland. Electronic address: milos.stojanov@chuv.ch.
2 Department of Fundamental Microbiology, Biophore, University of Lausanne, Lausanne, Switzerland.
3 Primal Health Research Centre, London, UK.
4 Materno-fetal and Obstetrics Research Unit, Department Woman-Mother-Child, Lausanne University Hospital, Lausanne, 1011, Switzerland. Electronic address: david.baud@chuv.ch.