[1] University of Helsinki and Helsinki University Hospital,Obstetrics and Gynecology
[2] HUSLAB,Clinical Chemistry
[3] Helsinki University Hospital,PEDEGO Research Unit, Medical Research Center, Obstetrics and Gynecology
[4] University of Helsinki and Helsinki University Hospital,undefined
[5] Folkhälsan Research Center,undefined
[6] Biomedicum Helsinki,undefined
[7] University of Oulu and Oulu University Hospital,undefined