1. Department of Haematology and Coagulation Disorders; Sahlgrenska University Hospital; Gothenburg Sweden
2. Department of Antenatal Care; Närhälsan; Primary Care; Västra Götaland Sweden
3. Institute of Clinical Science; Department of Obstetrics and Gynaecology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
4. Lund University; Centre for Thrombosis and Haemostasis; Skåne University Hospital; Malmö Sweden