1. Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA
2. Usher Institute of Population Health Sciences and Informatics, Edinburgh Cancer Research Centre, Edinburgh, Scotland
3. Komfo Anoyke Teaching Hospital, Kumasi, Ghana
4. University of Ghana, Accra, Ghana
5. Peace and Love Hospital, Kumasi, Ghana
6. Korle Bu Teaching Hospital, Accra, Ghana
7. Westat, Inc., Rockville, MD, USA