1. Department of Gynecology and Gynecological Oncology, Agaplesion Markus Hospital, Frankfurt am Main, Germany
2. Department of Medical Oncology, The Christie Hospital, Manchester, UK
3. Amgen, Inc., Thousand Oaks, CA 91320, USA
4. Public Health Sciences and Research Divisions, Fred Hutchinson Cancer Research Center, University of Washington School of Medicine, Seattle, WA 98109, USA