Affiliation: | 1. Department of Obstetrics and Gynecology, Oulu University Hospital, Oulu, Finlandjouko.jarvenpaa@ppshp.fi;3. Biocenter Oulu, University of Oulu, Oulu, Finland;4. Department of Clinical Chemistry, Oulu University Hospital, Oulu, Finland;5. Department of Internal Medicine, Oulu University Hospital, Oulu, Finland;6. Department of Obstetrics and Gynecology, Oulu University Hospital, Oulu, Finland |