1 (338) | Bill and Melinda Gates Foundation | USA | ||
2 (353) | Battelle Memorial Institute * | USA | ||
3 (488) | Walter Reed Army Institute of Research * | USA | ||
4 (746) | RAND Corp | USA | ||
5 (1407) | United Nations International Children's Emergency Fund, United States | USA | ||
6 (1693) | Family Health International * | USA | ||