1. Typhoid Programs, Sabin Vaccine Institute, Washington, D. C
2. Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia
3. Child Health Research Foundation, Department of Microbiology, Dhaka Shishu (Children) Hospital, Bangladesh
4. Department of Pediatrics and Child Health, Aga Khan University, Karachi, Pakistan
5. Translational Health Science and Technology Institute, Faridabad, India
6. Infectious Diseases and Geographic Medicine, Stanford University, California