Evaluation of AFP surveillance indicators in polio-free Ghana, 2009–2013
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J. Addo | M. Adjabeng | N. Ntim | J. Barnor | J. Odoom | E. Obodai | B. Sarkodie | Keren Minta-Asare | M. Eshun | Vincent V Ahove | S. Diamenu | Jacob Arthur-Quarm | Miriam Eshun | N. A. Ntim