1. Department of Obstetrics and Gynecology, Kuopio University Hospital, Kuopio, Finland
2. Department of Neuroscience and Neurology, Kuopio University, Kuopio, Finland
3. Department of Obstetrics and Gynecology, Oulu University Hospital, Oulu, Finland
4. Department of Medicine, Kuopio University Hospital, Kuopio, Finland