1. National Institute of Blood Transfusion/INTS, National Reference Center for Infectious Risk in TransfusionDepartment of Blood‐borne Agents Paris France
2. National Blood Center Nouakchott Mauritania
3. National Blood Center Bujumbura Burundi
4. National Blood Center Kinshasa Democratic Republic of the Congo
5. National Blood Center Bamako Mali
6. National Blood Center Antananarivo Madagascar
7. National Blood Center Niamey Niger
8. Department of HematologyFaculty of Medicine and Biomedical Sciences of University of Yaoundé I Yaoundé Cameroon
9. Departments of Laboratory Medicine and Epidemiology/BiostatisticsUniversity of California San Francisco San Francisco California
10. Vitalant Research Institute San Francisco California