1. Department of Cancer Epidemiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing, China
2. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health , Bethesda, MD, USA
3. Agencia Costarricense de Investigaciones Biomédicas (ACIB), Fundación INCIENSA , San José, Costa Rica
4. School of Medicine, University of California , San Francisco, CA, USA
5. Department of Pathology, University of Virginia , Charlottesville, VA, USA
6. Independent Consultant , San José, Costa Rica
7. Laboratory of Cellular Oncology, Center for Cancer Research, National Cancer Institute , Rockville, MD, USA
8. Information Management Services , Silver Spring, MD, USA
9. Viroclinics-DDL , Rijswijk, Netherlands
10. Early Detection Prevention and Infections, International Agency for Research on Cancer , Lyon, France