1. Department of Global Health, University of Washington, 325 Ninth Avenue, Box 359931, Seattle, Washington, 98104, United States of America (USA).
2. Department of Health Economics, Hanoi Medical University, Hanoi, Viet Nam.
3. Child Health and Development Centre, Makerere University, Kampala, Uganda.
4. Centre for Operations Research and Training, Vadodara, India.
5. PATH, Hanoi, Viet Nam.
6. PATH, New Delhi, India.
7. Estrategia Sanitaria Nacional de Inmunización (National Expanded Programme for Immunization), Ministry of Health, Lima, Peru.
8. PATH, Seattle, USA.