1. Dept. of OB/Gyn, University Hospital of Tübingen, Tübingen
2. Dept. of Radiotherapy, University Hospital of Tübingen, Tübingen
3. Dept. of OB/Gyn, University Hospital of Düsseldorf, Düsseldorf
4. Dept. of OB/Gyn, University Hospital of Erlangen, Erlangen