1. Department of Obstetrics and Gynecology; Skåne University Hospital; Lund University; Malmö Sweden
2. Department of Obstetrics and Gynecology; Institute of Clinical Science; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
3. Ultragyn AB; Stockholm Sweden
4. Department of Obstetrics and Gynecology; Southern Älvsborg Hospital; Borås Sweden
5. Department of Obstetrics and Gynecology; Helsingborg Hospital; Lund University; Helsingborg Sweden
6. Reproductive Medicine Center; Skåne University Hospital; Malmö Sweden
7. Department of Gynecology and Reproductive Medicine; Karolinska University Hospital; Stockholm Sweden