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Autor:
P J, Smith, M P, Battaglia, V J, Huggins, D C, Hoaglin, A, Rodén, M, Khare, T M, Ezzati-Rice, R A, Wright
Publikováno v:
American journal of preventive medicine. 20
The National Immunization Survey (NIS) is a large federally funded survey designed to estimate vaccination coverage rates for children residing in the United States aged 19 to 35 months. In 1999, over 8 million telephone call attempts were made to ob