1. University of Chicago Medical Center, Chicago, IL
2. Department of Public Health Sciences, The University of Chicago, Chicago, IL
3. Department of Radiation Biology, Radiotherapy & Radiodiagnosis, University of Lagos, Akoka, Lagos, Nigeria
4. Department of Obstetrics and Gynecology, Faculty of Clinical Sciences, College of Medicine, University of Ibadan/University College Hospital, Ibadan, Nigeria
5. Department of Radiology, Oncology Unit, Lagos State University, College of Medicine, Lagos, Nigeria
6. Department of Medicine, Olabisi Onabanjo University, Shagamu, Ogun State, Nigeria