[1] Med Univ Graz, Dept Cell Biol Histol & Embryol, Ctr Mol Biol, A-8010 Graz, Austria
[2] Univ Hosp, Dept Obstet & Gynaecol, Zurich, Switzerland
[3] Dept Reprod Med & Endocrinol, Bregenz, Austria
[4] Univ Leuven, Ctr Mol & Vasc Biol, Louvain, Belgium