1. Department of Obstetrics and Gynecology; NU Hospital Group; Trollhättan; and Sahlgrenska Academy at Gothenburg University; Gothenburg Sweden
2. Section of Hematology and Coagulation; Department of Medicine; Sahlgrenska Academy at Gothenburg University; Gothenburg Sweden
3. Department of Obstetrics and Gynecology; NU Hospital Group; Trollhättan Sweden
4. Department of Clinical Science and Education; Karolinska Institute; Stockholm South General Hospital; Stockholm Sweden
5. Department of Obstetrics and Gynecology; Sahlgrenska Academy at Gothenburg University; Gothenburg Sweden