[1] Univ Gottingen, Dept Gynecol & Obstet, D-37075 Gottingen, Germany
[2] Univ Bern, Dept Obstet & Gynecol, Inselspital, Univ Hosp, CH-3000 Bern, Switzerland
[3] Hannover Med Sch, Dept Cardiol & Angiol, D-3000 Hannover, Germany
[4] Univ Gottingen, Ctr Internal Med, D-37075 Gottingen, Germany
[5] Univ Hosp, Ctr Internal Med, Graz, Austria