1. Division of Cancer Epidemiology and Genetics National Cancer Institute Bethesda Maryland USA
2. Korle Bu Teaching Hospital Accra Ghana
3. Peace and Love Hospital Kumasi Ghana
4. Loma Linda University, School of Public Health Loma Linda California USA
5. Komfo Anokye Teaching Hospital Kumasi Ghana
6. University of Ghana Accra Ghana
7. Department of Pediatrics University of California San Diego California USA
8. Usher Institute and CRUK Edinburgh Centre University of Edinburgh Edinburgh UK