1. Global Health Working Group, Martin-Luther-University Halle-Wittenberg , Halle (Saale) , Germany
2. Institute of Medical Epidemiology, Biometrics, and Informatics, Martin-Luther-University Halle-Wittenberg , Halle (Saale) , Germany
3. Department of Preventive Medicine, School of Public Health, Addis Ababa University , Addis Ababa , Ethiopia
4. Department of Oncology, Saint Paul’s Hospital Millennium Medical College , Addis Ababa , Ethiopia
5. Department of Surgery, City of Hope National Medical Center , Duarte, Los Angeles, CA , USA
6. Department of Gynaecology, Martin-Luther-University Halle-Wittenberg , Halle (Saale) , Germany