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IP address: 18.209.209.246
Time: 2024-03-28T19:41:48Z
URL: http://scholar.google.com/scholar_lookup?title=Acellular+versus+whole-cell+pertussis+vaccines&year=1992&author=Halperin&journal=Can+J+Infect+Dis&volume=3&issue=2&pages=57-58&doi=10.1155%2F1992%2F564683&pmid=22529731