1. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health , Bethesda, MD, USA
2. World Health Organization , Geneva, Switzerland
3. Wits RHI, Faculty of Health Sciences, University of the Witwatersrand , Johannesburg, South Africa
4. Australian Centre for the Prevention of Cervical Cancer , Melbourne, Australia
5. Agencia Costarricense de Investigaciones Biomédicas- Fundación INCIENSA (ACIB-FUNIN) , San José, Costa Rica
6. Center for Cancer Research, National Cancer Institute, National Institutes of Health , Bethesda, MD, USA