1. Proteome Center Rostock, Medical Faculty and Natural Science Faculty University of Rostock Schillingallee 69 Rostock 18057 Germany
2. Department of Obstetrics and Gynecology, Medical Faculty University of Rostock Clinic Südstadt Rostock 18059 Germany
3. Department of Chemistry Alexandru Ioan Cuza University Bd. Carol I, No.11 Iasi 700506 Romania
4. Transcend Research Center Regional Institute of Oncology General Henri Mathias, No.2‐4 Iasi 700483 Romania
5. Department of Obstetrics and Gynecology, Medical Faculty RWTH Aachen University Aachen 52062 Germany
6. Department of Obstetrics and Gynecology, Medical Faculty University of Schleswig‐Holstein Campus Kiel, Arnold‐Heller‐Straße 3 Kiel 24105 Germany