1. Department of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden;
2. Department of Obstetrics & Gynecology, Vestfold Hospital Trust, Tønsberg, Norway;
3. Department of Medical Affairs, Astellas Pharma A/S, Kastrup, Denmark;
4. Department of Biometrics, CTC Clinical Trial Consultants AB, Uppsala, Sweden