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Impact of the introduction of pneumococcal conjugate vaccine on immunization coverage among infants

Nancy D Lin, Ken Kleinman, K Arnold Chan, Xian-Jie Yu, Eric K France, Stanley Xu, Feifei Wei, John Mullooly, Jeanne Santoli, Tracy A Lieu* and the Vaccine Safety Datalink Group

BMC Pediatrics 2005, 5:43  doi:10.1186/1471-2431-5-43

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