Affiliation: | 1. Department of Nursing Science, University of Eastern Finland, P.O. Box. 1627, 70211 Kuopio, Finland;2. Kuopio University Hospital, Kuopio, Finland;3. National Institute for Health and Welfare (THL), Helsinki, Finland;4. Department of Obstetrics and Gynaecology, Kuopio University Hospital, University of Eastern Finland, Kuopio, Finland;5. Helsinki University Central Hospital, Finland |