期刊
COCHRANE DATABASE OF SYSTEMATIC REVIEWS
卷 -, 期 1, 页码 -出版社
WILEY
DOI: 10.1002/14651858.CD000422.pub2
关键词
case-control studies; pneumococcal vaccines [*therapeutic use]; pneumonia, pneumococcal [*prevention & control]; prospective studies; randomized controlled trials; adult; aged; humans; middle aged