Children and international travel: immunizations.
Barnett
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ED
Maxwell Finland Laboratory for Infectious Diseases, Boston City Hospital, Department of Pediatrics, Boston University School of Medicine, MA 02118, USA.
Chen
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R
D002648:Child; D002675:Child, Preschool; D006801:Humans; D007114:Immunization / Q000592:standards / Q000639:trends; D007223:Infant; D014195:Travel