1. School of Public Health, Wachemo University, Hosanna, Ethiopia
2. Department of Preventive Medicine, School of Public Health, Addis Ababa University, Addis Ababa, Ethiopia
3. Department of Oncology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
4. Department of Gynaecology and Institute of Medical Epidemiology, Biostatistics and Informatics, Martin-Luther-University, Halle-Wittenberg, Germany
5. Surveillance and Health Services Research, American Cancer Society, Atlanta, GA