[1] Univ Hosp Muenster, Dept Obstet & Gynecol, Munster, Germany
[2] Univ Munster, Inst Epidemiol & Social Med, Munster, Germany
[3] Univ Paris 05, Sorbonne Paris Cite, Paris Cardiovasc Res Ctr, INSERM,U970, Paris, France
[4] DDL Diagnost Lab, Rijswijk, Netherlands
[5] QIAGEN GmbH, Dept Mol Diagnost Europe, Hilden, Germany