Cost analysis of post-polio certification immunization policies.

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Sangrujee, Nalinee, Cáceres, Victor M. & Cochi, Stephen L. (2004). Cost analysis of post-polio certification immunization policies.. Bulletin of the World Health Organization, 82 (1), 9 - 15. World Health Organization. http://www.who.int/iris/handle/10665/269055