1 Institute of Biochemistry and Molecular Medicine, University of Bern, Bühlstr. 28, CH-3012 Bern, Switzerland. Electronic address: christiane.albrecht@mci.unibe.ch.
2 Institute of Biochemistry and Molecular Medicine, University of Bern, Bühlstr. 28, CH-3012 Bern, Switzerland.
3 Department of Obstetrics and Gynecology, University Hospital, University of Bern, Bern, Switzerland.
4 Institute of Pathology, University of Bern, Bern, Switzerland.