[1] University Hospital of Essen,Department of Gynecology and Obstetrics
[2] University of Duisburg Essen,Department of Obstetrics and Gynecology
[3] Faculty of Medicine,Institute of Medical Statistics, Informatics and Epidemiology
[4] University of Cologne,Center for Molecular Medicine Cologne and Department of General, Visceral and Cancer Surgery
[5] Faculty of Medicine and University Hospital Cologne,Department for Orthopaedic and Trauma Surgery
[6] University of Cologne,Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf
[7] University Hospital of Cologne,Institute of Pathology
[8] Medical Faculty,undefined
[9] University Hospital of Cologne,undefined
[10] Medical Faculty,undefined
[11] University Hospital of Cologne,undefined
[12] Medical Faculty,undefined
[13] University Hospital of Cologne,undefined
[14] Medical Faculty,undefined