1 Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD.
2 Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC.
3 Hemato-Oncology Department, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.
4 National Cancer Institute Center for Global Health, Rockville, MD.
5 Institute of Human Virology, Department of Epidemiology and Public Health, Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD.
6 Institute of Human Virology, Abuja, Nigeria.
7 Center for Bioethics and Research, Ibadan, Nigeria.