1. Department of Gynaecology; Martin Luther University; Halle an der Saale Germany
2. Institute of Clinical Epidemiology; Martin Luther University; Halle an der Saale Germany
3. Radiotherapy Center; Addis Ababa University; Addis Ababa Ethiopia
4. School of Public Health; Addis Ababa University; Addis Ababa Ethiopia
5. Department of Surgery; Addis Ababa University; Addis Ababa Ethiopia
6. Axios International; Paris France
7. Department of Pathology; Addis Ababa University; Addis Ababa Ethiopia
8. American Cancer Society; Atlanta GA
9. Department of Epidemiology; Boston University; Boston MA