1. University of Cologne, Faculty of Medicine and University Hospital Cologne; Cochrane Haematological Malignancies, Department I of Internal Medicine; Cologne Germany
2. University Hospital of Würzburg; Department of Gynaecology and Obstetrics; Josef-Schneider-Straße 2 Würzburg Germany 97080
3. University of Cologne, Faculty of Medicine and University Hospital Cologne; Cochrane Cancer, Department I of Internal Medicine; Kerpener Str. 62 Cologne Germany 50937